Answer:
Option: C is the correct answer.
- The product of 5 and the square of 3x-4.
Explanation:
We are given a expression as:

Clearly there are two terms which are separated by a multiplication operation.
One term is: 5
and the other is:

i.e. the second term is the square of the expression: 3x-4
(i.e. 3 times of some number x is subtracted from 4)
and then the resultant operation that is applied is:
The product of 5 and the square of 3x-4.