Answer:

Step-by-step explanation:
Try using Symbolab, I use it all the time it gives the correct answer and it gives good explanations (this isn't a sponsor I've just been using it since the 6th grade lol).
The correct answer is the last one
This is because C and F do not join on the shape
ZR=AY, RL=YH, L equals H, Z equals A , ah =zl,
15 is the greatest common factor.
Vertical angels is the answer