Attack simulation training is the correct option.

This capability in Microsoft 365 Defender lets security teams build and run realistic simulations of attacker tactics and behaviors so they can test user susceptibility, measure detection and response, and improve defensive controls through repeatable exercises. The feature includes templates for phishing and credential harvest simulations and reporting that shows how users and systems responded during the scenarios.

Proactive threat hunting is incorrect because hunting is an active investigative process to find threats in your environment rather than a controlled service for emulating attacker behavior and training defenses.

Vulnerability assessment and risk analysis is incorrect because those capabilities focus on finding and prioritizing software and configuration issues rather than executing attacker-style simulations against users and controls.

Security performance dashboards is incorrect because dashboards provide metrics and visibility about security posture and incidents rather than running realistic attack simulations for testing readiness.

Threat surface reduction measures is incorrect because those controls aim to reduce exposure and block malicious behavior proactively rather than to emulate attacker tactics in order to run training exercises.

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