Simplify.

(x^2 + 5^x + 8) (x^2 + 2^x + 6)

A. x4 + 10x2 + 48

B. x4 + 2x3 + 6x2 + 7x + 14

C. 2x2 + 7x + 14

D. x4 + 7x3 + 24x2 + 46x + 48

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