Which corrects the shift in tense in this sentence? They all like camping, but none of them were enjoying crowds very much. A. are enjoying B. had been enjoying C. enjoy D. enjoying

I would argue that C. enjoy, is the correct answer because the camping is constant so the enjoyment of crowds is also likely constant. As well, it is in a form of present tense so it can't be past tense or future, and the use of "are enjoying" makes it passive which is typically frowned upon.