Perform the Subtraction and Simplify Your Answer $\sqrt { 80 } - \sqrt { \frac { 1 } { 5 } }$

Multiple Choice

Perform the subtraction and simplify your answer. $\sqrt { 80 } - \sqrt { \frac { 1 } { 5 } }$

A) $4 \sqrt { 5 }$
B) $\frac { 18 \sqrt { 5 } } { 5 }$
C) $5 \sqrt { 5 }$
D) $\frac { 21 \sqrt { 5 } } { 5 }$
E) $\frac { 19 \sqrt { 5 } } { 5 }$