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: John was on a road trip. Sentence2: Suddenly he felt a strange bumping. Sentence3: He pulled over and checked his tire. Sentence4: It was flat as a pancake! 
 (A) He called road assistance promptly. (B) He told his friends he was going to be on time.
A