ANSWER
D
EXPLANATION
A sequence is geometric when it has a common ratio (r)
The common ratio is calculated thus;
[tex]\frac{2nd\text{ term}}{1st\text{ term}}=\frac{3rdterm}{2ndterm}[/tex]The only option that satisfy the condition for calculating the common ratio (r) is;
[tex]\begin{gathered} d.-3,3,-3,3 \\ \frac{2nd\text{term}}{1st\text{term}}=\frac{3rdterm}{2ndterm} \\ 1stterm=-3 \\ 2ndterm=3 \\ 3rdterm=-3 \\ 4thterm=3 \\ \frac{2nd\text{term}}{1st\text{term}}=\frac{3rdterm}{2ndterm}=-\frac{3}{3}=-\frac{3}{3}=-1 \end{gathered}[/tex]
