@Harida5a
I think the reason it says that is because high level airspace used to be classified as A (and possibly B for TRAs?), I'm sure the people around here who actually are ATCOs (unlike me who is still not even in training, waiting for english test results and hopefully if I pass them a course allocation) can clarify that.
So basically above Fl195 you have class C airspace, and used to have Class B for TRAs and A for Airways above FL245, but to harmonise the airspace everything above FL245 is now class C.
At least that's how I understood it.