The pink trapezoid has been dilated to form the blue one. What factor was used to make the dilation?
Choices
A -4
B -3
C 3
D 4

Option C. 3

Step-by-step explanation:

The picture of the question in the attached figure

we know that

A dilation is a non rigid transformation that produce similar figures

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

In this problem the pink trapezoid and the blue trapezoid  are similar figures

so

The ratio of the greater base of the blue trapezoid to the greater base of the pink trapezoid is equal to the scale factor