Bus between Magome and Tsumago

hello who can halp me ?
I want take a bus on wednesday 27 october

a bus between magome and tsumago
on the timetable given by japan guide

I must choice A or B

I do'nt find a bus type A Or B only Z or C
is no bus in october and a wednesdya between the two village ?

thanks

In April I did the hike between Magome and Tsumago. However, I had made Plan B in case of rain - take a bus from Magome to Nakatsugawa, train from Nakatsugawa to Nagiso, then bus to Tsumago.....
It is doable but you have to try to co-ordinate all the schedules as the train does not run very often....the buses don't either for that matter...

is no bus in october and a wednesdya between the two village ?

Yes! C means daily except in winter (December to February), when it operates on weekends only:
http://www.japan-guide.com/bus/kiso.html