Answer:
D.Parallel to the base
Step-by-step explanation:
For the figures , the cake is cut into two parts with a cross-section parallel to the base. because there is new bases turned and the new base is similar to the original base.
The vertex point is whole without changes .
hence D is correct
{the new base are similar to the original base}
-credits to Zoe from Gauth math for the step-by-step explanation