Threats in security risk assessments are typically classified as either man-made (e.g., vandalism, terrorism) or natural (e.g., earthquakes, floods). This distinction helps define appropriate mitigation strategies.
A, B, and C describe other possible classifications but are not the foundational categories.
References:
PSP Study Guide - Threat Classification in Risk Assessment
POA Manual - Risk Types and Threat Sources

Nuisance alarms, particularly from doors, are often caused by mechanical failures such as worn hinges, faulty magnetic switches, or misaligned contacts. Regular inspections and maintenance are the most effective way to reduce false alarms.
Signage (A) helps inform but doesn't fix the mechanical issue.
Patrols (C) are reactive, not preventative.
Janitorial scheduling (D) can reduce traffic but doesn't address faulty hardware.
References:
PSP Study Guide - Alarm Systems and False Alarm Reduction
POA Manual - Electronic Security Maintenance Protocols

Multiplex systems allow multiple alarm signals to be transmitted over a single communication line. This significantly reduces the cost of leasing multiple phone lines while enhancing efficiency and providing a high level of security by encoding and validating data streams.
A (Circuit loop) is an older method using dedicated circuits.
C (Cellular) is wireless but may not always offer secure or low-cost options.
D (Dial-up) is cost-effective but offers limited security and speed.
References:
PSP Study Guide - Alarm System Technologies
POA Manual - Alarm Communication Systems

Material Safety Data Sheets (MSDS), now referred to as Safety Data Sheets (SDS) under the Globally Harmonized System (GHS), provide detailed information about chemicals, including hazards, handling procedures, and emergency measures. OSHA regulations require employers to maintain these sheets for all hazardous substances in the workplace.
Asset Standard Act (A), Procurement Asset Safety Program (C), and Product Stability Program (D) are not applicable to this requirement.
References:
OSHA Hazard Communication Standard (29 CFR 1910.1200)
PSP Study Guide - Hazardous Materials and Workplace Safety

Exclusion areas are the most secure zones within a controlled facility, designed specifically for handling or storing high-value, classified, or critical assets. These areas have strict access controls, surveillance, and protective measures in place to prevent unauthorized access or theft.
Limited areas (A) offer less stringent protection than exclusion areas.
Multiple areas (C) is a non-standard term.
"None of the above" (D) is incorrect because exclusion areas is the correct answer.
References:
ASIS POA Manual - Facility Protection Models
PSP Study Guide - Security Zoning and Asset Protectio