A. Posting an intentionally hurtful or mean comment on someone's social media and being blocked from that account.
B. Posting photos or videos of yourself doing illegal activities (drinking while underage, doing drugs, etc.). Companies and colleges look at your social media to see what you are really like, which could lead to not being accepted into a college or being kicked out of a sports team.
Answer:
Yes, because both have the same route of administration.
Yes, this is true!
For example, think about a situation in which your college is doing an experiment using some toxic chemicals. Let's say that they stumble and fall, the container breaks and some of the chemicals are sprayed on you! you need a protective equipment then.