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.

[EX Q]: Sentence: A cat and a dog both run at 5 mph. Question: If the cat runs for a longer time then the dog, which will have gone the greater distance? (A) cat (B) dog
[EX A]: cat

[EX Q]: Sentence: Teenage Mary and her grandmother, Millie, are both gymnasts. Both are talented athletes, even though Millie is getting a little stiff in her later years. Question: Between senior Millie and young Mary, which one is more at risk for broken bones? (A) Mary is more at risk (B) Millie is more at risk
[EX A]: Millie is more at risk

[EX Q]: Sentence: Harold learned in school that Uranus has a greater mass then Mercury. Question: This means that which planet emits stronger gravity? (A) Uranus (B) Mercury
[EX A]:
Uranus