Which two are prerequisites for using FLASHBACK TABLE?
选项：

A:Row Movement must be enabled on the table being flashed back
B:A tables indexes must be set to musable before issuing the flashback
C:A tables constraints must be disabled before issuing the flashback
D:The FLASHBACK ANY TABLE system privilege or the FLASHBACK object privilege must
E:The FLASHBACK ANY TABLE system privilege or the FLASHBACK object privilege must
F:必须在要回闪的表上启用行移动 G:在发出闪回之前，必须将表索引设置为不可用 H:在发出闪回之前，必须禁用表约束。