Your database is in ARCHIVELOG mode. You lost an index tablespace due to a disk failure while the database was open. You have neither a backup of the lost index tablespace nor the scripts containing the CREATE INDEX statements to recreate the indexes. Currently， several users are executing long-running queries on the database. What will happen to the ongoing activity in the database？（）

• A、 The queries that are currently executing will abort and an error message will be returned to the user.
• B、 The queries that are currently executing will execute normally but future queries will not executed.
• C、 Data Manipulation Language （DML） statements cannot be performed on the tables on which the indexes are based.
• D、 The currently executing and future queries will execute normally， but will be slower