Which shows a function for the sequence 16, 8, 4, 2, ...?

A. f (x) = 16 ∙ (2) (^x-1)

B. f (x) = 16 ∙ (1/3) ^ (x-1)

C. f (x) = 16 ∙ (1/2) ^ (x-1)

D. f (x) = 16∙ (1/4) ^ (x-1)

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