Write the next sentence in this paragraph:

How to travel from singapore to bangkok by train
In bangkok, go to any travel agent that has a sign showing " train tickets " or to the train station.
The main bangkok station that has trains going south is called hualamphong station.
Buy tickets to butterworth, malaysia.

Options: A. Both you and your luggage should be packaged together by the station and booked in advance. When on the train and off, sit in a bench in the middle of the area.; B. As soon as possible, order tickets from each thai railstation. When you board the train, ensure you have enough money to cover the fare.; C. Once you cross into malaysia you will exit the train and go through immigration and customs. Be sure to check " in transit " through malaysia.; D. Everything else should be done at butterworth street, or klee station. The main bangkok station is known as vn.;
C.