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: On a hot day, an endotherm may give off more heat by increasing blood flow to the surface of the body.
 Question: Karen is feeling very cool, and starts to chill. Her blood flow is decreased, likely because the day is 
 Choices: A)hot 
B)cold
A:
cold