Final answer:
Opportunistic ARTs (for the first ART) are at the intersection of systems and components.
Thus,the correct answer is d.
Step-by-step explanation:
The correct answer is d) Systems and components. Opportunistic ARTs (Antiretroviral Therapies) are a type of treatment approach used for the first time to treat HIV.
They are designed to take advantage of the patient's weakened immune system and to target both the major systems of the body, such as the immune system, as well as the components within those systems.