A ____________ drywall sheet installed on each side of a wood stud provides a one-hour rating. If the thickness of this drywall is doubled, then this would be given a _________ rating.

A.
½ inch-thick, two-hour

B.
½ inch-thick, three-hour

C.
5/8-inch-thick, two-hour

D.
5/8-inch-thick, three-hour

Explanation:
A 5/8-inch-thick drywall sheet installed on each side of a wood stud
provides a one-hour rating. If the thickness of this drywall is doubled, then this
would be given a two-hour rating. The rating system is used to classify different
building components.