Find f (k-1) for f (x) = 4x² + 3x + 7. Choose the correct response.

A: f (k-1) = -5k^2 + 4k + 8

B: f (k-1) = 4k^2 + 31k +14

C: f (k-1) = 4k^2 -5k + 8

D: f (k-1) = 4k^2 - 5k + 14