Are you able to provide an authoritative citation for that assertion? [that Class Bravo and Charlie are also examples of SUAs (as are class Deltas, for that matter).]

Three authorities:
1: Larry Dighera, who stated that he couldn't find "Special Use
Airspace" defined in FAR Part 1. I therefore take it to mean what the
standard English words mean: Airspace designated for a special use.

2: Jose, who asserts that the existance of requirements for entering
such airspace reserves it for a special use (use consistant with the
entry requirements).

3: Apollo, the makers of the LORANs in our airplanes, which warns of
"SUA Ahead" when approaching class Bravo and Charlie airspace.

Jose
--
There are two kinds of people in the world. Those that just want to
know what button to push, and those that want to know what happens when
they push the button.
for Email, make the obvious change in the address.