Need math help please!

Ineed asap.i cant understand this question i need someone to me right away

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)