Blood and oxygen I’m pretty sure if it’s one answer then it should be blood
HIV or Human Immunodeficiency Virus is a viral infection, which directly attacks Leukocytes (white blood cells). Leukocytes are the cells responsible for fighting infections that break past the skin. If the infection is not controlled it can cause a range of disorder's which form a syndrome called AIDS or Acquired Immunodeficiency Disorder Syndrome. When this happen common infection for such thing as a common cold can turn lethal as the body is unable to fight pathogen's effectively.
Not having any knowledge of what the drug might do to your body
The correct answer is B. Bachelors degree, however if you are looking to be advanced, a masters degree is recommended.