Detailed 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.
Problem:Sentence1: Clara went home from work one day. Sentence2: Then she realized she had locked herself out! Sentence3: Her keys were left on the kitchen table that morning. Sentence4: She had to call her mom for help. 
 (A) Clara liked being outside. (B) Clara's mom helped right away.
Solution:
B