Question

I Am Not Sure if B is Correct Please Help Me

Answer 1

YZ is the diameter, so arc YZ = 360°/2 = 180°

arc XZ = 360° - arc YZ - arc YWX = 360° - 180° - 100° = 80°

∠XYZ is an inscribed angle so it is equal to half the arc XZ

∠XYZ = 80°/2 = 40°