Of all the possible table options 6 is the best

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pairing do nothing to indicate what goes in that table. Of all the possible table options 6 is the best solution. While option 6 is not perfect it does separate the information so that each table only contains one theme. Of all the given fields none are the ideal field for use as a primary key within the tables. C. CUSTOMER (CustomerID , LastName, FirstName, Phone, Email) SALE (SaleID , PurchaseDate, InvoiceItem, Price, Tax,Total) It improves design because using CustomerID lets you find information better than looking for just a field name like LastName, FirstName, Phone, or Email. It is unique and the others may not be. The same goes for SaleID in the SALE table. D. SALE(SaleID , InvoiceItem, InvoiceDate, Tax, Total) SALE_ITEM(SKUnumber , InvoiceItem, Price) The tables have been broken apart so that sale information and the specific item’s information is separate. Each also has a field that operates as a candidate key for the rest of the fields. E. Designs 1-4 are inappropriate because they each have more than one theme in the tables. Design 6 is inappropriate because the Vendor field does not to be in the PURCHASE table, there should only be one theme. Design 5 is the best design of
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