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: If there are more greenhouse gases in the atmosphere, more ultraviolet radiation will be trapped and the Earth will heat up.
 Question: Carl is studying climate change, and notes that less ultraviolet radiation is being trapped, which means the earth will be 
 Choices: A)cooler 
B)warmer
[EX A]: cooler

[EX Q]: Paragraph: A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.
 Question: If Mona's country normally emits not a lot of greenhouse gas, but one day decides to raise the amount they emit, what will happen to the global temperature? 
 Choices: A)increase 
B)decrease
[EX A]: increase

[EX Q]: Paragraph: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.
 Question: Officer Ricky points a radar gun at a car. A slow car likely has _____ frequency waves bouncing off of it. 
 Choices: A)higher 
B)lower
[EX A]:
lower