The Smith's Snack Food Company Has a Number of Brands

The Smith's snack food company has a number of brands in addition to Smith's in its product mix, including Doritos, Twisties, Parker's, Nobby's, Red Rock Deli, Cheetos and Burger Rings, yet these are all known by their individual brand and not by the parent company name of Smith's. The branding approach that Smith's is taking is an example of:

A) co-branding.
B) brand extension.
C) family branding.
D) individual branding.