Use Descartes' Rule of Signs to Determine the Possible Number

Use Descartes' Rule of Signs to determine the possible number of positive and negative zeros of .

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