The Work Done by a Variable Force $F ( x ) = x ^ { 2 } + 4$

Multiple Choice

The work done by a variable force $F ( x ) = x ^ { 2 } + 4$ Newtons that moves an object along a straight line in the direction of F from x = 1 meters to x = 3 meters, in Newton-meters, is

A) $\frac { 50 } { 3 }$
B) $\frac { 50 } { 7 }$
C) $\frac { 55 } { 3 }$
D) $\frac { 55 } { 7 }$
E) $\frac { 64 } { 3 }$