Which expression is equivalent to 8x3 − 64 when factored completely? A. (2x − 4)(4x2 + 8x + 16) B. (2x + 4)(4x2 + 8x − 16) C. (2x + 4)(4x2 + 8x + 16) D. (2x − 4)(4x2 − 8x + 16)