Let $f ( x ) = x - \sin x$ On $[ 0,2 \pi ]$

Multiple Choice

Let $f ( x ) = x - \sin x$ on $[ 0,2 \pi ]$ The absolute minimum and maximum of ƒ are located respectively at x =

A) $0 , \frac { \pi } { 2 }$
B) $0 , \pi$
C) $\frac { 3 \pi } { 2 } , \frac { \pi } { 2 }$
D) $\frac { \pi } { 2 } , 2 \pi$
E) $0,2 \pi$