You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct option for the given question. Write down the answer index: 'A' or 'B'.

[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]: A

[EX Q]: Sentence: To save money, the contractor stopped buying the costlier wall supports he was required to use and started using some cheaper ones instead. As a result, several roofs collapsed. Question: Which wall supports were thinner? (A) The expensive wall supports were thinner (B) The cheaper wall supports were thinner
[EX A]: B

[EX Q]: Sentence: Mike rolled his tomato over a cutting board and over a counter. He noticed the temperature of the tomato rose more when he rolled it over the cutting board. Question: Which surface has more resistance? (A) cutting board (B) counter
[EX A]:
A