The nursing instructor is talking about HIV/AIDS with their pre-nursing pathophysiology class. The instructor explains to the class that the virus that causes HIV/AIDS is called a retrovirus. What characteristics of this retrovirus would the instructor talk with the class about?
a) Transmission of the virus
b) Cure rate of the virus
c) The fact that it is a mutated virus originally thought to be bovine in nature
d) HIV-1 and HIV-2 subtypes