A tabletop exercise is the most effective way to quickly assess a cybersecurity team's readiness to respond to a threat scenario. CompTIA Security+ SY0-701 describes tabletop exercises as discussion-based simulations where incident response team members walk through a realistic scenario to evaluate procedures, decision- making, communication, and coordination. These exercises are specifically designed to be conducted in a short timeframe while still providing meaningful insight into preparedness.
Executing a tabletop exercise allows management to observe how the team identifies threats, escalates incidents, assigns roles, and follows the incident response plan. Documenting performance results helps formalize findings, identify gaps, and improve playbooks and procedures without the complexity of a live incident or full-scale simulation.
Option A is informal and does not test real-time decision-making. Option B focuses on vulnerability discovery, not response readiness. Option D can be effective but is time-consuming and not suited for rapid assessment.
Therefore, C: Execute a tabletop exercise and document the performance results is the correct answer.