In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the sentence choices from (A) and (B), such that the story sounds fully coherent.

Let me give you an example: Sentence1: Rick grew up in a troubled household. Sentence2: He never found good support in family, and turned to gangs. Sentence3: It wasn't long before Rick got shot in a robbery. Sentence4: The incident caused him to turn a new leaf. 
 (A) He is happy now. (B) He joined a gang.
The answer to this example can be: A
Here is why: As mentioned in fourth sentence, the incident turned a new leaf to Rick's life; so, he must be happy now.

OK. solve this:
Sentence1: In the car the whole family was excited. Sentence2: After 9 hours of driving the were on their grandmother's block. Sentence3: Ahead they could see her house. Sentence4: The house was lit up in spite of the late hour of 4 AM. 
 (A) They decided to turn around. (B) They couldn't wait to see grandma!
Answer:
B