The IS-IS Overload Bit Is Set on R3

The IS-IS overload bit is set on R3. Which of the following statements are true? (Choose three.)

A) Before the timeout of the overload timer on R3, R1 and R2 do not add the LSPs generated by R3 to the SPF tree.
B) The direct route of R3 is ignored by R1 and R2 due to the setting of the overload bit.
C) LSPs of R3 cannot be flooded to R1 and R2.
D) Routes imported to R3 through the import-route command cannot be advertised.