删除当前目录下所有目录与文件应该使用哪个命令（） A: ADEL*.* B: BDELTREE*.* C: CFORMATC:///U D: DRECOVER

Which command will restore all datafiles to the date 9/30/2008 at 18:00 hours? （） A: Arestore datafiles until time '09/28/2008:21:03:11' B: Brestore database files until time '09/28/2008:18:00:00' C: Crestore database until time '09/28/2008:18:00:00' D: Drecover database until time '09/28/2008:18:00:00' E: Erecover database until timestamp '09/28/2008:18:00:00'