Which of the following best describes the role of a Grenadier in an Infantry Squad?

The role of a Grenadier in an Infantry Squad is primarily characterized by their ability to accomplish all rifleman tasks in addition to their specialized duties. Grenadiers are trained to engage targets effectively using grenades and other assigned weaponry, which provides the squad with enhanced firepower and versatility on the battlefield. This dual function allows them to perform as standard riflemen while also contributing to fire support with their grenades, making them integral to the squad's overall effectiveness in various combat situations.

Other roles mentioned, such as reconnaissance, transportation of heavy equipment, or first aid and medical support, are distinct tasks typically associated with different positions within the squad or the team structure. While every member of an Infantry Squad may participate in a variety of tasks as needed, the Grenadier's specific focus on engaging targets through both rifleman and grenade duties sets them apart as a key asset in combat engagements.