What is the polynomial function of lowest degree with lead coefficient 1 and roots i, –2, and 2?

a. f(x) = x3 – x2 – 4x + 4

b. f(x) = x4 – 3x2 – 4

c. f(x) = x4 + 3x2 – 4

d. f(x) = x3 + x2 – 4x – 4

a. f(x) = x3 – x2 – 4x + 4

b. f(x) = x4 – 3x2 – 4

c. f(x) = x4 + 3x2 – 4

d. f(x) = x3 + x2 – 4x – 4