A hotel chain has simple cabins on the island of Gotland, in Sweden. The support structure of each of these cabins is represented in Figure 2.
The geometric form of the surface whose edges are represented in Figure 2 is\\
(A) tetrahedron.\\
(B) rectangular pyramid.\\
(C) truncated rectangular pyramid.\\
(D) right rectangular prism.\\
(E) right triangular prism.