Can the triangles be proven congruent by SSS, SAS, ASA, AAS or cannot be proven

Answer:
ASA
Step-by-step explanation:
In the two triangles,
∠a = ∠a'
∠b = ∠b'
Side C is common
Two angles and the included side (ASA) are equal in the two triangles, so the triangles are congruent.