Final answer:
The nurse will adhere to Standard Precautions, including hand hygiene and the use of personal protective equipment, to prevent the transmission of HIV, the virus that causes AIDS. Therefore, the correct option is C.
Step-by-step explanation:
A nurse in the Intensive Care Unit (ICU) who is assigned a client diagnosed with AIDS will adhere to Standard Precautions when caring for the client. These precautions are designed to prevent the transmission of infections and include practices such as hand hygiene and the use of personal protective equipment when necessary, regardless of the patient's diagnosis. The human immunodeficiency virus (HIV), which causes AIDS, is a blood-borne pathogen that requires such precautions for containment. Special care is also taken to avoid exposure to blood and bodily fluids and to properly disinfect any surfaces or equipment that come into contact with the patient.