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 Input:
Paragraph: For a given medium such as air, sound has a slower speed at lower temperatures.
 Question: If Mary is blowing an air horn underwater and she raises the temperature of the water, what will happen to the speed of the sound waves generated by the air horn? 
 Choices: A)increase 
B)decrease

Ex Output:
increase


Ex Input:
Paragraph: Gluons make quarks attract each other more strongly the farther apart the quarks get.
 Question: When there are low levels of gluons in quarks it becomes 
 Choices: A)weaker 
B)stronger

Ex Output:
weaker


Ex Input:
Paragraph: So the higher an object is above a surface, the more potential energy it has.
 Question: Will drops a ball from 100 feet at the same time that Tony drops a ball from 50 feet. Whose ball has more potential energy? 
 Choices: A)Will's 
B)Tony's

Ex Output:
Will's