You will be given a definition of a task first, then some input of the task.
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: Caroline was a student in medical school. Sentence2: Caroline worked very hard to get good grades. Sentence3: One day Caroline failed a test by one point. Sentence4: Caroline was very frustrated but she continued to study hard. 
 (A) But she gave up. (B) Later, she passed the test.
Output:
B