Differentiate $f ( x ) = x ^ { 8 } + 2$

Multiple Choice

Differentiate: $f ( x ) = x ^ { 8 } + 2$

A) $8 x ^ { 7 } + 2$
B) $8 x ^ { 9 } + 2 x$
C) $8 x ^ { 7 }$
D) $7 x ^ { 7 }$