【单选题】

Savor

The Savor return is our most flexible leisure ticket. It can be used on all trains on Saturdays, Sundays and public holidays. On Mondays and Fridays it can be used on most trains except some peak trains.
Conditions of travel
- You must book your ticket at least seven full days before you start your journey.
- You must return within thirty-one days.
-Break of journey is not alloweD、
- There are no reductions on Savor return tickets for children under the age of sixteen.
- Savor return tickets are only available for journeys over fifty miles.
The Savor return ticket is NOT valid for ______A．Saturdays.
B．Sundays.
C．any public holidays.
D．certain peak trains.