Which of the following statements, when taken alone, could be used to prove that mep and def are similar?
select all the apply

a: angles pme is congruent to angle fde by corresponding angles

b: angles e is congruent to itself for both triangles

c: me/de=pe/fe

d: the triangles are dilated by a scale factor centered at point e

e: the scale factor is proportional

f: mp is parallel to df