A student wants to prove that the base angles of an isosceles triangle are congruent. The student draws Isosceles triangle ABC with base angles B and C, as shown below.

Point M is drawn as the midpoint of BC.

Which of the following could be used as part of the proof that_B ? Select three that apply.

A. ABM =~ AACM because of the SAS triangle congruence criterion.
B. B =~ C because corresponding parts of congruent triangles are congruent.
C. BM=~ CM because of the definition of a midpoint.
D. AB =~ AC because of the definition of an isosceles triangle.
E. AM =~ AM because of the Symmetric Property.