Answer:
C. p^16/q^12
Explanation:
The reason why the answer would be p^16/q^12 would be because, that if it is exponents. You always. Always. Subtract or Add depending if its multiplication or subtraction. So p^24-p^8 would be p^16. q^4-q^12 would be q^12.
Therefore, your answer would be p^16/q^12