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.
One 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.
Solution is here: A
Explanation: As mentioned in fourth sentence, the incident turned a new leaf to Rick's life; so, he must be happy now.

Now, solve this: Sentence1: Joseph was at the library. Sentence2: He wanted a new book but had no idea what to get. Sentence3: With so many choices, he felt overwhelmed. Sentence4: He decided on a new method of choosing a book. 
 (A) He closed his eyes and picked one. (B) Joseph went downstairs and got an ice cream.
Solution:
A