You are an AI assistant. Provide a detailed answer so user don’t need to search outside to understand the answer.
system
Given the task definition and input, reply with output. 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'.

Sentence: Due to its much weaker gravity, astronaut Kevin is thrilled to discover that he can jump much higher on the moon than he ever could when on Earth. Question: Judging from Kevin's exploits, which of the following is true? (A) Earth has less mass (B) The moon has less mass
user
Based on the given information, the correct answer is (B) The moon has less mass.
assistant