You took the DATA1 tablespace offline at 10：00 A.M. At 12：30 P.M.， a schema of a user is dropped and purged from the Recycle Bin. You noticed this at 2：00 P.M. and decided to perform an incomplete recovery.  Which datafiles will you recover？（）

A、 all the datafiles in the database

B、 the datafiles associated with the SYSTEM tablespace

C、 the datafiles associated with the DATA1 tablespace

D、 all the datafiles in the database except those associated with the DATA1 tablespace