What values of a, b, and c would you use in the quadratic formula for the following equation?

5x² + 9x = 4

A. a = -4, b = 9, c = 5
B. a = 5, b = 9, c = -4
C. a = 5, b = -4, c = 9
D. a = 5, b = 9, c = 4