Which polynomial represents the difference below?

(9x8 + 8x7 + 9) - (6x7 + 2x + 2)

A. 9x8 + 2x7 - 2x + 7
B. 3x8 + 2x7- 2x + 7
C. 9x15 + 3x7 + 7
D. 9x8 + 14x7 + 2x + 7