Which option correctly matches the Testing Methods description?

• A. It involves education on vaccination.
• B. It uses gloves, gowns, masks, and shields.
• C. It is regulated to prevent exposure.
• D. It detects antibodies through blood, oral, or urine samples.

Answer: (D)

Testing methods are ways we determine whether someone has been exposed to a pathogen or has developed an immune response by analyzing biological samples. Detecting antibodies through blood, saliva, or urine is a direct testing method because it involves measuring the immune response in those samples, giving information about prior exposure or vaccination.

The other options describe activities or systems that support safety but do not constitute the act of testing itself: education on vaccination is a preventive teaching activity, PPE use is about protective equipment to reduce risk, and regulation aims to prevent exposure through policy.