Patty's prescription antibiotic suggests that she take it for fourteen days. If she stops taking the medication after ten days, what could happen to the bacteria in Patty's body?

a
It could build up resistance to the antibiotic rendering the rest of the medication useless.
b
It could allow her immune system to build up resistance to that strain of bacteria forever.
c
It could build up a resistance to all antibiotics, turning into a "superbug".
d
It could cause her immune system to stop producing antibodies altogether.

a. It could build up resistance to the antibiotic rendering the rest of the medication useless.