Answer the following question in 3-4 complete sentences. Define the following:

Corbel dome
Tholos
Rotunda
Options:
A. A type of architectural dome; a circular burial structure; a cylindrical building.
B. A curved ceiling; a rectangular temple; a square building.
C. A triangular dome; an ancient shrine; an oval-shaped structure.
D. A flat roof; a triangular tomb; a hexagonal building.