A Man Places a Mirror on the Ground and Sees $b = 36$

Multiple Choice

A man places a mirror on the ground and sees the reflection of the top of a building, as shown in the illustration. $b = 36$ , $c = 252$ , and $h = 28$ .

A) 32
B) $\frac { 1 } { 6 }$
C) $\frac { 578 } { 3 }$
D) 4
E) none of these