Answer: C. Blisters
When the sores have healed and the skin looks normal again, the virus hides in the nerve cells under the surface of the skin.
I think it may be hurdles
These are what indicate that a person is mentally healthy from that list you wrote:
Is comfortable solving problems
Is accepting of others
Is able to form relationships
Is able to deal with disappointment
Something that a human or a living thing can get affecting it to be not the same
