Answer:
B. Pentagon
Explanation:
A cross-section is basically the 2D figure created by slicing through a 3D shape.
Take a look at this figure: it's a pentagonal prism. One note to remember is that for all prisms, their cross-sectional shapes are the same shapes as the shape of their bases.
Here, the two bases are pentagons, so we know the cross-section will be a pentagon.
Thus, the answer is B.
~ an aesthetics lover