The author definitely has a strict view of word usage and is against the “improprieties” of traditional grammar. Therefore, he would definitely not encourage arbitrary word meanings or the relaxation of grammar rules. On the other hand, he also recognizes that certain social conditions call for the use of words or phrases that would otherwise be unacceptable. The author would most encourage us to “reconsider our usage when the rationale is explained to us” (lines 31-32), or, in other words, recognize the reasons for particular usages of words and be discriminating about word choice in different contexts and social situations. C is therefore correct.