Answer with explanation:
In ΔREM and Δ D ME
1. MD=RE→→[Given]
2. RM= DE→→→[Given]
3. ME is common side.
≡ΔREM ≅ Δ D ME→→→[SSS]
Option C
⇒SSS postulate =SIDE-SIDE-SIDE , the two triangles have corresponding sides congruent.so the two triangle , ΔREM and Δ DME are congruent.