At database startup， you discover that one of the disks containing an index tablespace has been lost due to a media failure. A backup of the lost index tablespace is not available. You have all the necessary scripts to recreate the indexes. You need to re-create the indexes in a new index tablespace. Which action must you perform before re-creating the indexes？（）

A.Start the database in OPEN mode， and create a new index tablespace.

B.Start the database in OPEN mode， and drop the lost index tablespace from the database.

C.Start the database in MOUNT mode， create a new index tablespace， and drop the lost index tablespace from the database.

D.Start the database in MOUNT mode， drop the lost index tablespace from the database， open the database， and create a new index tablespace.