A healthy diet is a diet that is inclusive of all food groups and is varied. It’s a good idea to include fruits & veggies, whole grains, healthy proteins, healthy fats, and of course the occasional treat like ice cream or cookies !
The answer to this question would be "A" I believe.
I'm sure the answer you are looking for is specific to your class, but I would say that the nurse should provide something like, "The tumor is most likely benign, but until we test further, we can't know if it's malignancy."
It serves to digest food particles.