Write the right answer to the question based on the context passage.

Let me give you an example: Television drama's whole point is to bring you through an often slow start, followed by a complex development to a point where there are two or three potential dénouements before, "Cut!", it is the end of the episode and you will have to await the "right answer" in the following week's show.
This post came to me at 10pm last night, on Day 16 of this challenge, after a day of holidaying in London and with my head (and feet) too weary to put finger to touchscreen.
Mrs Mc and I had just watched another live instalment of Broadchurch, murder mystery extraordinaire, particularly since in the second series there is no actual fresh murder to investigate. The verdict is about to be given on the accused killer from Series 1 when the inevitable happens... Cue title music.
This moment has even gained a moniker in British homes, based on the theme tune to the real masters of the four-times-a-week cliffhanger, London-based soap opera Eastenders. It's call a "ba...ba...ba...ba, ba, ba-ba-ba-ba" (YouTube will provide overseas readers with auditory explanation).
Eastenders is such a master of writing in the perfect pace that every 28 minute episode ends with a tantalising screen freeze on the latest shocked face / smirking baddy / confused victim. For really big stories the cliffhanger can last significantly longer. This week, to celebrate the show's 30 year birthday, we will finally find out the answer to a question unanswered for the past 14 months: "Who killed Lucy Beale?"
Now, most classrooms do not involve murder, incest, dodgy deals and danger, but "good teaching" encourages a type of pacing that totally ignores the ingredients that have millions in the edges of their seats every day: the good old cliffhanger. In fact, we see teachers giving away the punchline at the beginning: "Today we are learning this:...". Question: What was the soap opera admired by British people that the author says is a master of writing?
The answer to this example can be: Eastenders
Here is why: The seventh sentence of the passage clearly states that Eastenders is master of writing. So, the answer is Eastenders.

OK. solve this:
"To be real honest, Jeffrey, you're not making much progress," said Greg. "Are you practicing at all?"
"Well, yeah. Mom makes me. She sits there watching to make sure I'm getting the right fingering and phrasing."
"Hmm. I might need to talk to her about that." Greg hated when kids were forced into musicianship. He had been teaching private music lessons for more than ten years, and had seen it often. Parents made their kids miserable. It rarely worked anyway. "You don't really want to take piano, do you?"
"No, Sir."
"Well... "
"I wish my mom would let me take guitar lessons. That would be cool."
"You know you'd get calluses like this." Greg held out left hand and showed Jeffrey his fingertips.
"Yeah! My friend, Zach, has calluses. They're hard like plastic."
"Well, you know, it hurts for a while--until you build them up."
"I don't care. I love the guitar. I've been begging Mom to switch me from piano to guitar."
"I'll talk to her."
"Great! I already have a guitar and--"
"--don't get too excited yet. We'll see what she says."
"Thanks, Mr. Tenorly." He jumped up and ran for the front door. Then he stopped, rushed back over to grab his piano books, and raced out the door.
Greg's 3:30 lesson had been cancelled, so he now had a thirty minute break. Oftentimes, during a break, he would step outside and wander down the sidewalk, observing the townspeople going in and out of the shops around Coreyville Square.
But something was bugging him. His dad's birthday party was only a few days away. He hoped he wouldn't regret letting Cynthia talk him into going. Question: Who jumped up and ran for the door?
Answer:
Greg