Answer:
1. A
Here the statement is simply stating a fact therefore it is asserting whether something is true or not.
2. C
This is asserting an opinion as to whether something should be done or not because it is saying indirectly that one should not take medication without a doctors approval.
3. B
Judges whether using research is a good action so falls under B.
4. C
In saying that this is a necessary action to do, it falls under C which talks about actions that should or should not be done.
5. A
This asserts that Honesty being the best policy is the truth so falls under A.