Given Are Two Similar Triangles Shown in the Figure $c = 10$

Multiple Choice

Given are two similar triangles shown in the figure. If $c = 10$ , $b = 8$ and $c ^ { \prime } = 5$ find $b ^ { \prime }$

A) $\frac { 5 } { 4 }$
B) $4$
C) $\frac{5}{8}$

D) $\frac { 1 } { 4 }$
E) $2$