Which term fills the blank in the rule about the first entrant into a vehicle or small boat?

• A. Private
• B. Cadet
• C. Sergeant
• D. Junior

Answer: (D)

The rule uses a term that signals lower seniority or younger status in the group. When a boat or vehicle is boarded, designating the first entrant as the junior communicates that this person is the one with less seniority, so they go first. This keeps the order clear and follows a common etiquette: those with higher rank or more experience wait until the junior has taken the lead.

The other options don’t fit as well because they’re specific ranks or categories (private and sergeant are explicit military ranks; cadet is a trainee designation) and don’t inherently convey the idea of “the first entrant.” Junior, by contrast, directly expresses the relative position in the group and indicates who goes first.