This surveillance task is described as obtaining a representative amount of the CBRN hazard for subsequent analysis later.

• A. Collect
• B. Quantify
• C. Monitor
• D. Observe

Answer: (A)

The key idea is gathering a sample that can be tested later. In CBRN surveillance, you want a representative amount of the hazard so it can be analyzed in the lab or a facility to determine its nature, concentration, or composition. Collecting means physically obtaining that sample from the environment in a way that preserves its integrity for later analysis.

Quantifying focuses on measuring how much is present, but that measurement typically comes after you’ve collected a sample. Monitoring involves watching conditions over time without taking material for later testing, and observing is simply watching or noting what’s seen without collecting material. So collecting is the action that directly yields the material needed for subsequent analysis.