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Which Transact-SQL statement should you use?

You develop a Microsoft SQL Server server database that supports an application. The application
contains a table that has the following definition:
CREATE TABLE Inventory
(ItemID int NOT NULL PRIMARY KEY,
ItemsInStore int NOT NULL,
ItemsInWarehouse int NOT NULL)
You need to create a computed column that returns the sum total of the ItemsInStore and
ItemsInWarehouse values for each row.
Which Transact-SQL statement should you use?
A. ALTER TABLE Inventory
ADD TotalItems AS ItemsInStore + ItemsInWarehouse
B. ALTER TABLE Inventory
ADD ItemsInStore – ItemsInWarehouse = TotalItemss
C. ALTER TABLEInventory
ADD TotalItems = ItemsInStore + ItemsInWarehouse
D. ALTER TABLE Inventory
ADD TotalItems AS SUM(ItemsInStore, ItemsInWarehouse);
Answer: A