simplify: (2x^2 - 9x + 3) + (-7x^2 + 4x - 2)
A-5x^2 - 13x + 1
B-5x^2 + 5x - 1
C9x^2 - 4x + 1
D-5x^2 - 5x + 1
A-5x^2 - 13x + 1
B-5x^2 + 5x - 1
C9x^2 - 4x + 1
D-5x^2 - 5x + 1