Answer:
Answer choice c
Explanation:
This is an instance of dilation of a pre-image, EFGH to an image E'F'G'H'
In a dilation of a polygon, the angles do not change only the lengths
The transformation is

This means each coordinate in the original pre-image is divided by 3 to get the new image E'F'G'H'
Therefore each side of the polygon is also reduced by 1/3
hence the correct answer choice is c