Question

What are the possible numbers of positive, negative, and complex zeros of f(x) = x^6 + x^5 + x^4 + 4x^3 − 12x^2 + 12?
A.) Positive: 2 or 0; negative: 4, 2, or 0; complex: 6, 4, 2, or 0
B.) Positive: 4, 2, or 0; negative: 2 or 0; complex: 4, 2, or 0
C.) Positive: 2 or 0; negative: 2 or 0; complex: 4, 2, or 0
D.) Positive: 2 or 0; negative: 0; complex: 6, 4, 2, or 0
I think its B