A rounded ceiling where panels of art work merge in the center of the circle. This example of architecture displays a(n) . a. arch c. truss b. dome d. vault

B) dome

Explanation:

A dome can be regarded as architectural element having similar shape with hollow upper half of sphere. The term " dome" is usually overlap with the term " cupola" , this cupola can be regarded as done , it can also be regarded as structure that is usually on top of dome. It should be noted that dome is rounded ceiling where panels of art work merge in the center of the circle, and this is example of architecture displays.