600.Which of the following statements are true about the BACKUP command? (Choose all that apply.)
A.The BACKUP command can not be used to make image copies of a datafile.
B.The BACKUP command can improve performance by multiplexing backup files.
C.The BACKUP can take advantage of the block-change tracking capability.
D.The BACKUP command cannot store data in incremental backups.
E.The BACKUP command can store data in cumulative incremental backups only.
正确答案是BC