Q5 (8 points): Based on Section 5.4 and 5.5, consider the polynomial function f(x)=4x^3-12x^2-x+3. Use Descartes's Rule of Signs to determine:
Options:
A) The number of positive real roots of f(x)
B) The number of negative real roots of f(x)
C) The number of complex roots of f(x)
D) The number of rational roots of f(x)