Answer:
D
Explanation:
A colonnade is a long series of columns lined up in a row that are covered by a roof. The roof is often decorated to add to the elegance of the colonnade, and there is often a small wall more more than a foot or two feet high on either side to add an extra flourished.
There are also colonnades that are built in curves, circles, or semicircles, and others that bildt indoor with vaulted ceilings.
