Which polynomial function could be represented by the graph below?

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1

Which polynomial function could be represented by the graph below?
A. f(x) = x2 – 6x + 8
B. f(x) = 3x2 – 18x + 24
C. f(x) = x2 + 6x + 8
D. f(x) = 3x2 + 18x + 24