(A) ** uninviting or lacking humor
(B) a giant
(C) a reeper
(D) a Christmas pageant
EXPLANATIONS BELOW
Concept note-1: -: stern or forbidding in action or appearance. a grim taskmaster. : somber, gloomy.
Concept note-2: -adjective. A situation or piece of information that is grim is unpleasant, depressing, and difficult to accept.
Concept note-3: -Grim is an adjective-Word Type.