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.
Answer: B. appealing... unappealing
Explanation:
You inhale when contracting muscles and exhale when finishing a rep.
