A projecting piece usually provided to support a truss, is A. Cornice B. Coping C. Frieze D. Lintel

The correct answer is: D. Lintel

A lintel is a horizontal structural member that spans and supports the weight of the wall above an opening such as a door or window. It is typically made of stone, brick, concrete, or wood.

A cornice is an architectural molding that crowns a wall or building. It is typically made of stone, brick, concrete, or wood.

A coping is a protective covering for the top of a wall or other structure. It is typically made of stone, brick, concrete, or metal.

A frieze is a decorative band that runs along the top of a wall. It is typically made of stone, brick, concrete, or wood.