Answer:
The answer is A. 9x +4x^2 -5y
Explanation:
In order to find the difference, subtract each terms.
in order for 5x to get to 14x you have to +9x
in order for -7x^2 to get to -3x^2 you have to +4x^2
and last, in order for 7y to get to 2y, you have to -5y
Hope it helps!