【单选题】

First Great Western provides a convenient and accurate ticket selling service. We start a legal contract with us when you purchase a ticket and travel with us; these are available at our staffed stations or from ourCustomer Services Teams. Tickets for traveling on our services can be purchased by a variety of methods whose details are given below.

You can buy a full range of tickets from First Great Western ticket offices. When buying a ticket we promise to give you detailed information and to sell you the most appropriate ticket for your journey.
Ticket selling (出售) machines, most of which accept both cash and credit cards, will be available at many First Great Western stations offering a wide range of tickets for services travelling from that station.
Tickets for travel on First Great Western services or elsewhere on the National Rail network may be purchased in advance online at www.firstgreatwewstern.co.uk. Tickets purchased online can be posted to you, or collected at many stations through ticket selling machines.
When journeys start at stations where there is no ticketing facility available, it is your responsibility to pay your fare to the on-board staff who are able to issue the normal range of tickets.
If you are travelling in a group of 10 or more people you should contact our group booking service on 08457 000 125. Not only wilt our staff be able to direct you to trains with sufficient seats, you may enjoy a discount on your ticket.
When can you buy a ticket direct from the on-board staff
A、When you start from a station with no ticketing service.
B、When the tickets are all sold out in the booking office.
C、When you travel in a group of ten or more people.
D、When you travel on a train with sufficient seats.