Please help! :] 50 Points and awarding Brainliest. Consider the following right pyramid and right prism. Both figures have a base that is a regular pentagon.

Heidi tried to use Cavalieri's principle to show that the two figures have the same volume.

"The base areas are the same. Therefore, corresponding cross-sections have the same area. The figures have the same height. So the volumes must be the same."

What is the first mistake Heidi made?
Choose 1 answer:

(Choice A)
A
The base areas are not the same.

(Choice B)
B
It isn’t true that corresponding cross-sections have the same area.

(Choice C)
C
The heights are not the same.