The following question consists of a sentence(s) with one blank only. You are given six words as answer choices and from the six choices you have to pick up two correct answers, either of which will make the sentence meaningfully complete.

His _________ nature made it hard for the workers to approach him with their troubles.

A. Corpulent

B. Denigrate

C. Didactic

D. Formidable

E. Fearsome

F. Discomfit