Answer:
The square E is obtained by dilating square A by the scale factor of 3.
Step-by-step explanation:
We are given that,
The square 'A' is dilated by the scale factor of 3.
<h3>'Dilation changes the size of the figure according to the scale factor'.</h3>
We have that the scale factor for the given dilation is 3.
That is, the new figure is an enlargement of square A.
So, option C and D are discarded.
So, the ratio of the sides of the square A and dilated square must be equal to 1 : 3.
In square B, the ratio of sides = 
In square E, the ratio of sides = 
So, we see that,
<h3>The square E is obtained by dilating square A by the scale factor of 3.</h3>