Monotonous can fill in the blank of each sentence except-

A) To _____ something means to take away its edge, its energy, or its excitement.

B) When something goes on and on and on and on and on, the same way, for a long time, ____

C) ____ things are boring and repetitive, like that long story you've heard your brother tell a hundred times
before.

D) Things are__don't change much, and they're dull as dishwater