How does a conductor extend a ticket for a passenger?

The correct response is based on the process that conductors follow when a passenger wishes to extend their journey beyond the original destination indicated on their ticket. When a conductor extends a ticket, they charge the fare from the original destination to the new destination. This effectively ensures that the passenger pays for the entire journey they wish to complete, rather than only the initial portion of their trip.

This method is straightforward and allows the conductor to quickly process the fare adjustment while on board, facilitating a seamless travel experience for the passenger. It aligns with standard practices for fare collection and ticketing, ensuring that all travel segments are accounted for and revenue is generated for the extended travel.

Other options, such as issuing a new ticket at the ticket office or taking payment at the time of boarding, do not reflect typical procedures in extending an existing ticket where fare adjustments must be calculated en route. Additionally, contacting the ticket office for approval may be part of certain processes, but it is not how conductors typically handle fare adjustments directly during the journey.