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: Warm air is less dense than cool air, so it rises higher in the troposphere.
 Question: If Jim raises the temperature of the air inside his balloon, will his balloon rise higher into the air or sink towards the ground? 
 Choices: A)rise higher 
B)sink lower
rise higher

Paragraph: The greater the mass of the objects, the stronger the gravitational pull between them.
 Question: Two small planets are near each other, and two large planets are near each other. The smaller planets, compared to the larger planets will have a gravitational pull that is 
 Choices: A)weaker 
B)stronger
weaker

Paragraph: Less massive objects also have less gravity than more massive objects.
 Question: The most massive objects have _____ gravity than less massive objects. 
 Choices: A)higher 
B)lower
higher