Answer: C. 9z^10
Why:
You must distribute the square through the values.
So to begin,
-3^2 equals 9
(z^5)^2 equals z^10 (since exponent to an exponent is just multiplying both of them and 5 times 2 is 10)
So getting 9 and z^10 to combine, we get 9z^10
