Answer:
c. ASA.
Explanation:
Given triangle QRS has been translated to create triangle Q'R'S'.
We are given that
RS=RS'=2 units
Angle S= Angle S'=


ASA congruent property: When two triangles are congruent by ASA postulates it means Angle-Side-Angle .
We can say that if two angles and base side of two angles are equal to its corresponding angles and base then triangles are congruent by ASA.
We are given that two angles R and S are equal to its corresponding angles R' and S' and base side RS of two angles R and S equal to its corresponding base side R'S' of two angles R' and S'.

By ASA ( Angle-Side-Angle ) postulate.
Hence, option c is correct.