A classmate asks you to check their answer to this problem:
Simplify: a^3b^5a^2b^-3
They got a^6b^-15 as their final answer. Are they correct?
A. No, there should not be negative exponents. The final answer should be a^6/b^15
B. No, the answer is not correct. When the bases are being multiplied, you need to add the exponents.
C. No, the answer is not correct. When the bases are being multiplied, you need to multiply the exponents.
D. Yes, this is the correct answer.