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).

[EX Q]: 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 lower gravitational force 
 Choices: A)earth 
B)mars
[EX A]: mars

[EX Q]: Paragraph: The more extreme the amount of metamorphism, the more difficult it is to tell what the original rock was.
 Question: If pressure has exerted less force on a rock and decreased it's metamorphism, would it be 
 Choices: A)easier to determine what the original rock was 
B)harder to determine what the original rock was?
[EX A]: easier to determine what the original rock was

[EX Q]: Paragraph: For a given medium, sound waves travel more slowly at lower temperatures.
 Question: Compared to sound waves travelling through a cup of boiling water, would sound waves travelling through a cup of ice water move 
 Choices: A)slower 
B)faster?
[EX A]:
slower