Answer:
perpendicular to the base.
Explanation:
To Find: How would you describe the slice that created the rectangular cross-section on this cake
Solution :
Cross-section : A cross section is the shape we get when cutting straight through an object.
In this case we observed that since the cake is a rectangular prism then the cross section after the cut is rectangular.
Thus we can conclude that cross section is perpendicular to the base of the cake.
Hence Option D is correct.: perpendicular to the base.