Which of the following is correct?

A

(3x + 4y)(4x ­- 3y) = $$12x^{2}+7xy-12y^{2}$$

B

(3x + 4y)(4x -­ 3y) = $$12x^{2}+251xy-12y^{2}$$

C

(3x + 4y)(4x -3y) = $$12x^{2}-7xy+12y^{2}$$

D

(3x + 4y)(4x-3y) = $$12x^{2}-251xy+12y^{2}$$