Question

Which statement illustrates the transitive property for congruence of triangles?

A. If Triangle ABC is congruent to Triangle DEF, then Triangle DEF is congruent to Triangle ABC.

B. If Angle A is congruent to Angle D and Angle D is congruent to Angle X, then Angle A is congruent to Angle X.

C. If Triangle ABC is congruent to Triangle DEF and Triangle DEF is congruent to Triangle XYZ, then Triangle ABC is congruent to Triangle XYZ.

D. Triangle ABC is congruent to Triangle ABC.

It's either B or C, but I'm confused if I should choose the angles or the triangles.