单选题 Which of the following is equal to x²⁴ for all positive values of x?
A. x¹²+x¹²
B. (-x¹²)^-2
C. (x⁶)⁶
D. (x²)(x³)(x⁴)
E. (x⁷²)^1/3

【正确答案】 E

【答案解析】When exponents are raised to another power, you multiply the exponents together; of the answer choices, E is the only answer that corresponds to x²⁴.