You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for the RMAN. To accomplish the backup， you issued the following RMAN command：  
RMAN> BACKUP SECTION SIZE 300M TABLESPACE users；  
Which two statements are true regarding the execution of the above command？（）

You need to perform an online table redefinition of an existing SALES table to partition it into two tablespaces TBS1 and TBS2. The SALES table has a materialized view， materialized log， indexes， referential integrity constraint， and triggers with the PRECEDES clause existing on it. 
What action is required for dependent objects when you perform online table redefinition？（）