geometry (please explain)

Question

Triangle PQR was translated using the rule (x − 2, y + 5) and then dilated by a scale factor of 3 to create triangle P″Q″R″. Which statement explains why the triangles are similar?

 A. Translations and dilations preserve orientation; therefore, the corresponding angles of ΔPQR and ΔP″Q″R″ are proportional. 

B. Translations and dilations preserve side length; therefore, the corresponding sides of ΔPQR and ΔP″Q″R″ are congruent. 

C. Translations and dilations preserve betweenness of points; therefore, the corresponding sides of ΔPQR and ΔP″Q″R″ are proportional. 

D. Translations and dilations preserve collinearity; therefore, the corresponding sides of ΔPQR and ΔP″Q″R″ are congruent.

Answer 1

corrected

Answer A only says angles are proportional which is not equality (congruency is equality)

preserving orientation means keeping polygon angles the same

triangles are similar if angles have equality (angle 1=angle 1, angle 2=angle 2, angle 3=angle3)

Answer is C. since similarity means also having sides in proportion,