Use Descartes' Rule of Signs to Find the Number of Possible

Multiple Choice

Use Descartes' rule of signs to find the number of possible positive, negative, and nonreal roots for the following equation. $$7 x ^ { 3 } + 5 x ^ { 2 } - 8 x + 8 = 0$$

A) $\quad 0$ or 2 positive; 1 negative; 0 or 2 nonreal
B) $\quad 0$ positive; 0 negative; 3 nonreal
C) $\quad 1$ positive; 0 or 2 negative; 0 or 2 nonreal
D) $\quad$ l positive; 1 negative; 1 nonreal
E) none of these