What is the primary benefit of grading of lumber?

A. It permits a building to be constructed with a higher degree of fire resistance.
B. It permits the acquisition of a more fire-resistive rating for all wood buildings.
C. It permits higher grades to be used only when needed for specific applications.
D. It permits the building to construct a building that will have less shrinkage and warping.

Ans: C. It permits higher grades to be used only when needed for specific applications.