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.
Q: Sentence1: After math class, I decided to go to the library. Sentence2: I caught up on some assignments. Sentence3: I had to wait several hours for my mom to pick me up. Sentence4: Since I was extremely tired, I fell asleep completely. 
 (A) I didn't get any homework done. (B) I got up and ran a marathon.
A: 
A