AIDS is caused by a virus whose genetic material is
Human immunodeficiency virus (HIV) has a protein coat and a genetic material which is single-standed RNA. HIV is a retrovirus, which means it carries single-stranded RNA in its genetic material rather than the double-stranded DNA human cells carry.
Retroviruses also have the enzyme reverse transcriptase, which allow it to copy RNA into DNA and use that DNA "copy" to infect human, or host cells.
The correct option is C.