Wow, there are so many things I could think of. I would tell them that I am so proud of them for still working through it. You have to understand that people are always going to judge, that doesn’t mean it’s the right thing to do, but it will happen. Bullies are usually very insecure about themselves and like to bring other people down in the sense that it ‘brings them up’. Ignore it, let it roll off your shoulders because their comments? They mean nothing. Don’t give them the satisfaction of being hurt by it. If you don’t let it bother you they will eventually get bored because it doesn’t give them anything back. Be the bigger person. You got this!!
It is relatively easy to spot a gerund, given that it looks like a verb + ing. Having that in mind, the gerund here is drinking from the tap. This gerund acts as the subject of the sentence, which you can easily determine by asking the question What is perfectly safe?, and the answer will be Drinking from the tap - that's how you know it is the subject.
So, the correct answer is drinking from the tap/subject.
C is the answer because it sounds more civil rather than random. it gives you a lead-" The teen boot camp is actually really good" it allowes you to explain it without it sounding off