Exam 1z0-063 topic 1 question 63 discussion

Actual exam question from Oracle's 1z0-063

Question #: 63
Topic #: 1

Users report this error message when inserting rows into the orders table:
ERROR atline1:
ORA-01654f:unable to extend index USERS.ORDERS_IND by 8in tablespace INDEXES
You determine that the indexes tablespace is out of space and there is no free space on the filesystem used by the Oracle database.
Which two must you do to fix this problem without affecting currently executing queries?

A. drop and re-create the index
B. coalesce the orders„ind index
C. coalesce the indexes tablespace
D. perform an on line table rebuild using dbns_redefir.ition.
E. rebuild the index online moving it to another tablespace that has enough free space for the index