Find the Indicated Term(s) of the Given Sequence $- 3,9 , - 27,81 , \ldots$

Multiple Choice

Find the indicated term(s) of the given sequence.
-The general term of the sequence $- 3,9 , - 27,81 , \ldots$

A) $a _ { n } = ( - 1 ) ^ { n } 3 ^ { n }$
B) $a _ { n } = 3 ^ { n }$
C) $a _ { n } = 3 ^ { n + 1 }$
D) $a _ { n } = ( - 1 ) ^ { n + 1 } 3 ^ { n + 1 }$