What is a primary function of the Infantry Regiment regarding enemy engagement?

The primary function of the Infantry Regiment in the context of enemy engagement is to repel an enemy's assault by fire and close combat. This role is fundamental to the Infantry's mission, which centers around close combat and direct engagement with adversaries. Infantry Regiments are specifically organized and trained to seize, occupy, and defend terrain, utilizing a combination of small arms fire and coordinated assault tactics to break the enemy's will and capability to fight.

The focus on engaging the enemy through direct conflict is critical, as infantry units are often the first to encounter enemy forces and are relied upon to engage and neutralize threats effectively. This function ensures the safety of supporting units and helps maintain the offensive initiative on the battlefield.

In contrast, while air support and naval assault missions may involve the broader operational scope of military engagements, these tasks are typically carried out by specialized units rather than the Infantry Regiment itself. Additionally, logistics and supply management, while crucial for operational success, do not fall under the primary combat responsibilities of the Infantry; instead, they support the operational readiness of front-line forces. Thus, option C accurately encapsulates the core mission of infantry units in enemy engagement scenarios.