[AUCTeX] automatic command confirmation

[Maurizio Vitale]

In many (most) cases I'm happy with the default commands that auctex
wants to run, yet I'm offered a default which I have to accept by
pressing <enter>.
A cursory examination of doc and code seems to indicate that the default
numeric argument (as in C-uC-cC-c) should prevent auctex from asking for
confirmation. Unfortunately it doesn't seem to work for me.

Is that the right way? If not, is there a way?

TIA,

        Maurizio