Explain which is the BEST reason why the angle-angle criterion (AA) is sufficeint to establish similarity in triangles.

A. The triangle sum theorem states that all triangles have a sum of 180 degrees.

B. If two angles are congruent, then two sides are congruent. This is enough to prove the triangles are similar.

C. If two angles are congruent, then the side in between them is congruent too. This is enough to prove the triangles are similar.

D. If you know two corresponding angles are congruent in two triangles, then the third angles would have to be congruent too. The degrees in a triangle add up to 180 degrees.