Think about the process. Simplify this expression. Assume the c and y are nonzero. Which rule(s) for exponents did you use? c⁹y¹⁸/c⁹y⁹

A. Zero exponent property
B. Power of a quotient
C. Power of a product
D. Dividing powers with the same base
E. Power of a power
F. Multiplying powers with the same base

The expression simplifies to y^9 using the rule for dividing powers with the same base (D).