CHECKED IN BY SEATING ASSIGNMENT

• A. Boarding pass verification
• B. Seating chart lookup
• C. By seating assignment
• D. Security checkpoint

Answer: (C)

This describes how the check-in status is determined based on assigning a seat. When you’re told you’re “checked in by seating assignment,” it means the act of checking in is based on the system assigning a seat to you, rather than simply verifying a boarding pass or passing through security. That’s why the best way to express it is “by seating assignment”—the seat assignment is the trigger that completes the check-in process. The other options refer to different steps: boarding pass verification is about confirming your ticket, the security checkpoint is a separate stage, and looking up a seating chart describes finding where to sit rather than the act of checking in.