Agreed. If someone "feels sentimental," does that not make it fall under the umbrella of "emotions"? I also get why B is correct, but given the whole sentimental/emotional thing, wouldn't A be more correct?

I did, but I thought it was wrong because the workers were never described as innocent in any specific way.

@danielkarny87463 said:

I am interested! Also, should I memorize the word indicators for necessary and sufficient conditions?

YES!!! I recommend doing this ASAP so that you can practice. I thought I would pick them up as I went along, but that was a significant roadblock. Make some flashcards or use Quizlet (or whatever free one is out there now) for a few days; it makes all the difference. The time spent hesitating and second-guessing can be detrimental, so memorizing the indicators and working on understanding the exceptions are 100% worth your time, in my opinion.