Given Are Two Similar Triangles Shown in the Figure $a = 1$

Multiple Choice

Given are two similar triangles shown in the figure. If $a = 1$ and $b = 3$ find $C$

A) $2 \sqrt { 2 }$
B) $\frac { 1 } { 3 }$
C) $\sqrt { 10 }$
D) $\frac { \sqrt { 2 } } { 3 }$
E) $\frac { \sqrt { 10 } } { 3 }$