Answer:
When you raise a power to another power, you multiply the exponents. Therefore, to simplify (3x²y²)³, you need to multiply the exponent 3 by each of the exponents in the parentheses:
(3x²y²)³ = 3³ x (x²)³ x (y²)³
= 27x^6y^6
So, the expression that is equivalent to (3x²y²)³ is 27x^6y^6, which is option C.