When using IS-IS for IP routing, Dual IS-IS defined by RFC 1195, what is true? (multiple answer)

A.
It is necessary to configure a NSAP address.

B.
It is not possible to perform both IP and CLNS routing wih the same process.

C.
IP address and subnet information is carried in the TLV field on the L-1/L-1 LSPs.

D.
Dual IS-IS does not support VLSM information.