The image shown has two triangles sharing a vertex: What is the measure of ∠WZX, and why?

A. y over 2, because Triangle UVW is congruent to triangle WXZ

B. y, because Triangle UVW is similar to triangle ZXW

C. y + 50 degrees, because Triangle UVW is similar to triangle ZXW

D.130 degrees − y, because Triangle UVW is congruent to triangle WXZ