It Makes Sense That You Should Take Antibiotics Long Enough

It makes sense that you should take antibiotics long enough to kill off most of the pathogens affecting you, but why shouldn't you take them for too long?

A) They can have unpleasant side effects.
B) If you expose the pathogens to antibiotics for too long, those with resistance will have time to outcompete the non-resistant variations and the whole population will be resistant.
C) If you expose the pathogens to antibiotics for too long, there will be time for them to evolve mutations allowing resistance to the antibiotics.
D) You won't just kill all the pathogens in your body, but also most of the bacteria that you need to stay healthy.
E) If humans take antibiotics for too long, they'll become resistant to them.