Crisis management plans are primarily concerned with:
Crisis management team structure (A)
Disaster operations and coordination (B)
Media communication strategies (C)
While vital records (D) are important to business continuity planning, they are not a core function of crisis management, which focuses more on command, communication, and high-level decision-making during emergencies.
References:
PSP Study Guide - Crisis Management vs. Continuity Planning
ASIS International - Crisis Communication and Command

A suicide attack is a tactic where the attacker intentionally sacrifices their life to ensure the success of the mission. This is seen in tactics such as suicide bombings or vehicle-borne IEDs. It is used to maximize impact, instill fear, and often guarantees media attention.
References:
ASIS POA Manual, Chapter: Terrorism Tactics and Trends
Global Terrorism Database
ASIS PSP Guide, Domain 1: Threat Assessmen

PIR (Passive Infrared) detectors are most effective when motion occurs across the sensor's field of view. This maximizes the differential detection of body heat moving against the ambient background.
B and C (Movement toward/away) produce weaker thermal contrasts.
A (Defeat attempts) is a risk but not a mounting consideration.
References:
PSP Study Guide - Intrusion Detection Sensors
POA Manual - Motion Sensor Installation Guidelines

A hybrid staffing model uses both proprietary and contract security personnel. In this scenario:
Proprietary staff can be assigned to sensitive and top-secret projects for tighter control, loyalty, and internal vetting.
Contract staff can manage less critical areas such as visitor parking, reducing cost.
This model is both secure and cost-effective, offering flexibility and risk-based deployment.
B (Contract) is cost-effective but lacks control for sensitive tasks.
C (Proprietary) is highly secure but more expensive.
D (Total systems) is not a staffing strategy.
References:
PSP Study Guide - Security Operations and Staffing Models
POA Manual - Contract vs. Proprietary Security Management

Worms are a form of malware that replicate and spread through networks. In doing so, they consume system memory and processing resources, which can result in performance degradation or denial of service for legitimate applications and users. Some worms are specifically designed to exhaust system memory.
References:
PSP Study Guide - Worm Behavior and System Impact
ASIS POA Manual - Computer Security Threats