What is one of the benefits of using smoke missions in military operations?

Using smoke missions in military operations primarily serves to obscure units during movement, making option C the most accurate choice. Smoke is effectively deployed to create a visual barrier, hindering an enemy's ability to see friendly forces as they maneuver. This obstruction allows for safer troop movement and positioning, particularly in areas where the enemy has a clear line of sight.

The use of smoke can also create confusion and disorientation among enemy forces, contributing to tactical advantages in various combat scenarios. It is important to understand that while smoke may have secondary effects—such as affecting enemy morale or creating a sense of uncertainty—the primary tactical application is to provide concealment for friendly units. This is why deploying smoke effectively can be a decisive factor in achieving operational objectives during engagements.