Which expression is equivalent to 16a4 - b4? A. (2a + b)(2a - b)(4a2 + b2) B. (2a - b)(2a - b)(4a2 + b2) C. (2a + b)(2a + b)(2a - b)(2a - b) D. (2a - b)(2a - b)(2a - b)(2a - b)
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