Find the equation that the given graph represents.
A. f(x) = -x3 - x - 4
B. f(x) = -x4 + x2 - 3x - 4
C. f(x) = 2x4 - x2 + 4
D. f(x) = 2x3 + x2 - 3x + 4
Answer: D
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Fill in the blank(s) with the appropriate word(s).