Multi-select problem: How does the next paragraph end?

How to change amtrak reservations
Change your ticket delivery method.
You can choose to have your tickets sent by mail or arrange to have them ready for pick-up at an amtrak kiosk, amtrak station, or amtrak vending machine.
Modify the times or dates of your reservation based on your new traveling plans.

Options:
[a]. You should change your ticket delivery method weekly by changing your dates from 7 to 7 a.m. or bi-weekly by changing your dates from 4 a.m.;
[b]. You may change your schedule on the amtrak website to allow it to have certain times and date changing arrangements as well. For example, if you're going to amtrak this weekend, don't be surprised if your first couple of stops are extremely late.;
[c]. You have your departure time stamped and your travel dates during the day. You can cancel last-minute reservations that are later than the dates on your calendar.;
[d]. There are no penalty fees for changing a reservation. You may be required to pay the difference in cost if your new, updated ticket has a higher rate.;
[d].