Use Descartesʹ Rule of Signs to Determine the Possible Number $$7 x ^ { 3 } - 3 x ^ { 2 } + 3 x + 3 = 0$$

Multiple Choice

Use Descartesʹ Rule of Signs to determine the possible number of positive real zeros and the possible negative real zeros for the function.
- $$7 x ^ { 3 } - 3 x ^ { 2 } + 3 x + 3 = 0$$

A) Positive $( 1,0 )$ , negative $( 1,0 )$
B) Positive $( 1,0 )$ , negative (2)
C) Positive $( 0 )$ , negative $( 2,1 )$
D) Positive $( 2,0 )$ , negative $( 1 )$