Which statement about tap-in/tap-out is true?

• A. They require no authentication.
• B. They use magnetic stripe only.
• C. They calculate trip-based charges based on entry and exit taps.
• D. They are always slower than cash payments.

Answer: (C)

Tap-in/tap-out charges are based on the journey you take, captured by two taps: one when you start and one when you finish. The system uses those two events to determine the fare, typically by distance traveled or zones crossed, so the charge matches the actual trip. Authentication happens at both ends to tie the ride to you, and the technology isn’t limited to magnetic stripes—many systems use contactless cards or mobile devices. These methods are designed for quick interactions, not slower cash payments. So the statement that tap-in/tap-out calculates trip-based charges from entry and exit taps best describes how this system works.