The Line Integral $\int$ C $x y ^ { 2 } d s$

Multiple Choice

The line integral $\int$ C $x y ^ { 2 } d s$ where C is the curve $x = \cos t , y = \sin t , 0 \leq t \leq \frac { \pi } { 2 }$ , is

A) $\frac { 7 } { 3 }$
B) $\frac { 5 } { 3 }$
C) $\frac { 4 } { 3 }$
D) $\frac { 2 } { 3 }$
E) $\frac { 1 } { 3 }$