In δmnp, a is the midpoint of mn, b is the midpoint of mp, and c is the midpoint of np. which statement must be true?

a) cm, bn, and ap intersect eachother inside the triangle
b) ab is congruent to bc is congruent to ac
c) cm is congruent to bn is congruent to ap
d) ab, bc, and ac intersect eachother inside the triangle

if you could provide some sort of explanation that would be nice, !