Adilation with a scale factor of 3 takes triangle pqr to triangle xyz. what is the ratio of the perimeter of triangle pqr to the perimeter of triangle xyz?

I encountered a similar problem but it had choices. These were its choices:
A)1 : 3 B)1 : 1 C)3 : 1 D)3 : 3

Dilation with a scale factor of 3 means that the original triangle was made bigger and created the resulting triangle. 

PQR was the original triangle. XYZ was the resulting image and it is 3 times the size PQR. Thus, the ratio of the perimeter of triangle PQR to the perimeter of triangle XYZ is 1:3 

The answer would be a