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).

[Q]: 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
[A]: rise higher


[Q]: Paragraph: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.
 Question: Ray was traveling in rocket leaving orbit. He keeps the empty fuel containers on board so the ship can fly 
 Choices: A)higher 
B)lower
[A]: lower


[Q]: Paragraph: As the water is pumped out, the water table slowly falls, requiring wells to be dug deeper, which takes more money and energy.
 Question: Milo loves to dig wells for a living. If he needs to dig a well deeper to reach water, what does that do to the money and energy it takes to dig the well? 
 Choices: A)increases 
B)decreases
[A]:
increases