think CC = Century Club which is 100. good luck! I have over 100, 90 in LOTW DXCC credits and maybe 50 in QSL cards. I want to submit for my first Mixed DXCC but deciding if I should wait for 100 LOTW DXCC QSLs.
It sounded like a real easy question but if one does not know CC = Century Club and it's not spelled out in the rules clearly it's not as simple a question as it seems.
With regard to your choice, Delwyn. If you are active and working new one's regularly you may as wait and do it all electronically since you should get 10 more LoTW credits in fairly short order.
I only stated LoTW about 18 months ago and I'm up to 248 confirmed via LoTW. Eventually I will probably have to sit down with a card checker and add the QSL cards to the LoTW credits.
73 and have fun,