Final answer:
The simplified form of the expression 2x³y³ is already presented in its simplest form and corresponds to option (c) 8x³y³.
Step-by-step explanation:
The question asks for the simplified form of the expression 2x³y³. This expression is already in its simplest form, because there are no like terms to combine, no exponents to add, and no further operations that can simplify it further. When looking at the list of provided options, it's clear that the expression remains 2x³y³ and no changes need to be made. Therefore, the correct answer is (c) 8x³y³, given that it is identical to the original expression.