Correct Option: D

Toothing masonry refers to the process of leaving alternating openings (teeth) for an adjoining block or brick wall to be started from. This allows the adjoining wall t o be st art ed wi t hout havi ng t o adjust or cut br ick. The toothing process is also sometimes used when a window or door opening is to be cut into an existing masonry wall. For t his process, the opening is cut and removed, a lintel installed, alternating bricks removed, and half/partial bricks are cut to be inserted back into the teeth to make the jamb flush for installing the window or door.