In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

[Q]: [header] How to choose a protein supplement [title] Choose whey protein to build muscle. [step] If you're looking for muscle-building protein, whey protein is generally your best option. Whey protein can come in the form of powder or pills and is commonly used when people are trying to build muscle via things like weight training programs. <sep> (A) By doing this, you're gaining more body fat and growing more muscle at the same time. [substeps] Whey protein can be found in half of the packaged foods. (B) Whey protein is also a low-fat protein, rich in red blood cells from bacteria. Although whey protein does not impart healthy fats to the body, whey protein helps build muscle, which you can grow and burn through exercise. (C) [substeps] Look for a whey protein powder or supplement with a high biological value. This measures how well your body can absorb the protein. (D) Whey protein occurs as a food chain, hence the slogan, " protein is fat free ". [substeps] Whey protein is complex and varies from patient to patient.
[A]: C


[Q]: A mini pool table has a set of colorful pool balls set up in the middle in a triangle shape and the white ball is alone. a man <sep> (A) walks into the pool room wearing an orange swimsuit and begins playing with the ball as a lot of people are standing around by the pool. (B) approaches the mini table, touches the white ball and moves it into position to hit it with the pool stick. (C) is talking to the camera and showing various machine that appear to be emergency preoutfits. (D) of average height, wearing a blue shirt and glasses competes pool holding a rubik's cube on his right hand, a current type of swiffer machine machines sitting on a mat with two wheels to help you.
[A]: B


[Q]: A mini pool table has a set of colorful pool balls set up in the middle in a triangle shape and the white ball is alone. a man <sep> (A) walks into the pool room wearing an orange swimsuit and begins playing with the ball as a lot of people are standing around by the pool. (B) approaches the mini table, touches the white ball and moves it into position to hit it with the pool stick. (C) is talking to the camera and showing various machine that appear to be emergency preoutfits. (D) of average height, wearing a blue shirt and glasses competes pool holding a rubik's cube on his right hand, a current type of swiffer machine machines sitting on a mat with two wheels to help you.
[A]:
B


