I don't see any options, but it would most likely be the one that is most caring and understanding.
Answer:
a person paying for a service such as a haircut
Explanation:
a consumer is someone who buys things, I'm pretty sure
HIV crossed from chimps to humans in the 1920's in what is now the Democratic Republic of Congo. This was probably as a result of chimps carrying the Simian Immunodeficiency Virus (SIV), a virus closely related to HIV, being hunted and eaten by people living in the area.
Dermis I believe is responsible