instruction:
You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
question:
Question: The number of arrangements that can be made with the letters of the word COPY so that the vowels occupy the even places?

Option A: 6

Option B: 144

Option C: 777

Option D: 992

Option E: 221
answer:
Option A

question:
Question: In the xy-plane, a line has slope 5 and x-intercept 3. What is the y-intercept of the line?

Option A: -15

Option B: -3

Option C: 0

Option D: 3

Option E: 9
answer:
Option A

question:
Question: It takes Avery 3 hours to build a brick wall while Tom can do it in 2 hours. If the two start working together and after an hour Avery leaves, how much time will it take Tom to complete the wall on his own?

Option A: 20

Option B: 30

Option C: 40

Option D: 50

Option E: 60
answer:
Option A