You will be given a definition of a task first, then some input of the task.
You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: The further objects are away from each other, the smaller the gravitational force.
 Question: The sun exerts gravitational force on all the planets, which has a higher gravitational force 
 Choices: A)earth 
B)mars
Output:
earth