Given the task definition and input, reply with output. 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.

Sentence1: Harry was doing his homework but had trouble with math. Sentence2: He decided to look for help on Youtube. Sentence3: After doing a few lessons, he saw an interesting video. Sentence4: The video was exciting and so he decided to watch another. 
 (A) Harry decided math would be a great topic for a video game. (B) Harry finally overcame the distraction and returned to his math.

B