Find a Recursive Rule for the Nth Term of the Sequence

Find a recursive rule for the nth term of the sequence.
- $2 , - 8,32 , - 128 , \ldots$

A) $a _ { n } = a _ { n - 1 } \cdot - 3$
B) $a _ { n } = a _ { n - 1 } \cdot - 4$
C) $a _ { n } = a _ { n - 1 } \cdot - 7$
D) $a _ { n } = a _ { n - 1 } \cdot - 8$