Find a Formula for the Nth Term of the Sequence $0,2,0,2,0$

Multiple Choice

Find a formula for the nth term of the sequence.
- $0,2,0,2,0$ (alternating 0 's and 2's)

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