Use Descartes' Rule of Signs to Determine the Possible Number

Multiple Choice

Use Descartes' Rule of Signs to determine the possible number of positive and negative zeros of f(x) = 6x³ - 5x² + 6x - 6.

A) 3 positive reals or 1 positive real;3 negative reals or 1 negative real
B) no positive reals;no negative reals
C) 3 positive reals or 1 positive real;1 negative real
D) 1 positive real;3 negative reals or 1 negative real
E) 3 positive reals or 1 positive real;no negative reals