Your data warehouse includes three separate SQL Server 2005 tables for storing customer data. Each table is used to horizontally partition data that is migrated from a SQL Server 2000 installation to SQL Server 2005. Data is partitioned as shown in the following table.

The database does not allow customers to opt-out of e-mail marketing offers. You need to add a new OptOutFlag column to each of the customer tables. You must ensure that this column is added to either all three customer tables or none of them. You must also ensure that the database is always in a consistent state. Which Transact-SQL batch should you use?

A.
BEGIN TRAN ALTER TABLE CUSTOMER1 ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER2 ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER3 ADD OptOutFlag BIT NULL IF @@error <> 0ROLLBACK TRANELSECOMMIT TRAN

B.
BEGIN TRAN BEGIN TRY ALTER TABLE CUSTOMER1 ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER2 ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER3 ADD OptOutFlag
BIT NULL END TRY BEGIN CATCH ROLLBACK TRAN RETURN END CATCH COMMIT TRAN

C.
ALTER TABLE CUSTOMER1ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER2ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER3ADD OptOutFlag BIT NULL

D.
BEGIN TRAN ALTER TABLE CUSTOMER1 ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER2 ADD OptOutFlag BIT NULL ALTER TABLE CUSTOMER3 ADD OptOutFlag BIT NULL
COMMIT TRAN