Which algebraic expression is equivalent to the expression below?

(4x • 7)(5x • 9)
A.
(4 + 5)(7 + 9)(x + x)
B.
(4 • 5) + (7 • 9) + (x • x)
C.
(4 • 5)(7 • 9)(2 • x)
D.
(4 • 5)(7 • 9)(x • x)