Answer:
Option d. 4
Step-by-step explanation:
The correct expression is 
we know that
To find the value of the expression we will substitute the given value of x and y in the expression.
For x=32, y=2
substitute

I think it's D, - 12 indicates a loss of something /something getting less
I got the second one as my answer.....
8/a^5 x a