Aregular octagon rotates 360° about its center. how many times does the image of the octagon coincide with the preimage during the rotation?

a.) 1
b.) 2
c.) 4
d.) 8

Given that the octagon rotates 360 degrees, it is a given that for every regular division of the polygon (360/8 = 45 degrees), the image would coincide with the pre-image during the rotation. Therefore, the octagon would coincide a total of 8 times as it rotates 360 degrees about its center. 

No solution : there is no number of boxes that she bought