Find the Indicated Partial Sum for the Sequence with the Given

Multiple Choice

Find the indicated partial sum for the sequence with the given general term.
- $\mathrm { s } 10 , \mathrm { a } _ { \mathrm { n } } = ( - 1 ) ^ { \mathrm { n } }$

A) $- 10$
B) 1
C) 0
D) $- 1$