If ABC= DEF, which congruences are true by CPCTC? Check all that
apply.

Corresponding parts of congruent triangles are congruent. That is, the order in which the vertices of each triangle are listed matters here. In particular, the congruence of ABC and DEF implies <A=<D, <B=<E, <C=<F, AB=DE, BC=EF, and AC=DF. (equation editor isn't cooperating, and I don't particularly feel like looking up a Unicode congruence symbol)

Of these, answer choices B, C, and E match the above congruences.