Who enters a vehicle first according to military protocol?

The correct answer reflects the military protocol that emphasizes establishing clear hierarchy and situational awareness during vehicle entry. The individual of the lowest rank typically enters a vehicle first to ensure that they are positioned for potential threats or ambushes. This practice allows higher-ranking personnel to maintain a tactical advantage and provides them with the ability to assess the environment while remaining secure.

By allowing the lowest-ranking member to enter first, the military also reinforces the principles of teamwork and mutual respect, ensuring that everyone understands their roles within the unit. This approach minimizes confusion and enhances the overall safety of the team in potentially dangerous situations.

The other answers focus on the roles of higher-ranking officials but do not align with the established protocol intended to mitigate risks while maintaining operational readiness.