下面创建表空间的语句正确的是 A: CREATE TABLESPACE XXX TEMPFILE 'C:\XXX.DBF'SIZE 50m; B: CREATE UNDO TABLESPACE XXX TEMPFILE 'C:\XXX.DBF'SIZE 50m; C: CREATE TEMPORARY TABLESPACE XXX TEMPFILE 'C:\XXX.DBF'SIZE 50m; D: CREATE TEMPORARY TABLESPACT XXX DATAFILE 'C:\XXX.DBF'SIZE 50m;