Final answer:
The three steps a breath tech must complete before testing a subject are Calibration, Verification, and Testing, listed in Option A. These steps are essential for accurate breathalyzer results. The correct option is A).
Step-by-step explanation:
The three steps a breath tech must complete before testing a subject are: Calibration, Verification, and Testing. These steps are vital to ensure that the breathalyzer is working correctly and providing accurate results. The correct option that lists these steps is Option A) Calibration, verification, testing.
Calibration: This step involves setting up the breathalyzer machine to ensure that it measures alcohol levels accurately. The machine is adjusted to a baseline using a known reference point or standard.
Verification: After calibration, the machine's accuracy is verified. This is usually done by running the machine through a series of controls to confirm that it produces correct readings.
Testing: Finally, the subject is tested using the properly calibrated and verified machine to measure their breath alcohol concentration. Option A) is the correct one.