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: So the higher an object is above a surface, the more potential energy it has.
 Question: Dane is dropping bouncy balls out of windows. He drops a green ball out of the first story window, then a red ball out of the second story window. The ball with the least potential energy is the 
 Choices: A)red ball 
B)green ball
[EX A]: green ball

[EX Q]: Paragraph: More recently, the death rate has fallen because of the availability of more food and medical advances.
 Question: When the villagers are dying sooner, the food source is likely 
 Choices: A)great 
B)small
[EX A]: small

[EX Q]: Paragraph: Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.
 Question: Would a diesel powered submarine release less pollution if it were running on 
 Choices: A)its diesel engine 
B)its battery backup power?
[EX A]:
its battery backup power?