Instructions: 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.
Input: Sentence1: Alex needed groceries. Sentence2: She made a list of things to buy. Sentence3: She gathered her reusable canvas sacks. Sentence4: She walked to the store. 
 (A) Alex bought a yacht. (B) She bought the groceries.
Output:
B