Judging by the word acclaim in the second half
of the sentence, you can tell that a synonymous words needs to fill in
the bank. Perusal means examination, to parody is to poke fun of
by imitation, extenuation is like vindication, and ignorance means a type
of stupidity or blindness towards something, so none of those words.
Commendation (root word: commend) means praise or acclaim; so (C) fits.