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.