The first 3 figures in a pattern are shown. image Which of the following functions represents f(n), the number of small squares in figure n? A. f(n) = n2 – 1 B. f(n) = 2n2 + 1 C. f(n) = (n + 1)2 + 1 D. f(n) = (n + 1)2 – 1