Answer:
11 is probs either a or c, i dunno, sorry!
12 is a, stopping the bleeding
13 is a, biological agents (because their living microorganisms)
14 is true, i believe
15 is false (they can wear a plain ring but nothing with grooves and such because it might carry pathogens)
17 is true
18 is probably c
19 i would say is false, it doesn't matter if chemicals are labeled they probably shouldn't be near any food.
20 is b, that's just ridiculous.
21 is b
i'd say 22 is d
23 is most likely false
24 is true
25 is a, it's important to know in case of a fire but doesn't help prevent one.