Which DSCP classification is defined in RFC 2474?

Which DSCP classification is defined in RFC 2474?

A.
DSCP CS3.

B.
DSCP 0.

C.
DSCP AF11.

D.
DSCP CS6.

E.
DSCP EF.

F.
DSCP CS2.

G.
DSCP CS1.

H.
DSCP AF21.