Çözüldü Similar Triangles

https://i72.servimg.com/u/f72/19/97/10/39/simila11.png
https://www.scribd.com/document/723839256/Digital-SAT-Maths-Module-2-Harder
[The last question (number 22), no answers]

Test Approach: If you do not know anything, pick C or D as both have the information given in I.

Geometric Solution:
For similarity;
If ∡B = 40° then ∡Y must also measure 40° ≠ 50°, so II is wrong.
If ∡B = 40° then ∡Z = 180° - 77° - 40° = 63°, so III is true.

Correct Choice: D (I and III)