When calculating cost as part of a cost-benefit analysis, the key factors to consider are:

Comprehensive Detailed Explanation:

In a cost-benefit analysis for physical security systems, the total cost must account for:

Acquisition cost: Initial purchase and installation.

Life cycle cost: Operating, maintenance, support, and energy use over time.

Replacement cost: Cost to replace or upgrade the system at end-of-life.

These factors give a comprehensive view of the true investment required, rather than just the initial purchase.

B and C partially include relevant elements, but only A captures the full scope.

D misses the operational costs involved in life cycle consideration.