Detailed Instructions: You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Problem:Sentence: Marla is running around the track, while her mom lags behind pushing the baby's stroller. Question: Who take a longer time to make a lap? (A) Marla (B) her mom
Solution:
her mom