________ occurs when a company introduces additional items in a given product category under the same brand name, such as new flavors, forms, colors, ingredients, or package sizes.

The major influences on the buying process at General Aeronautics Limited include supply conditions and technological changes, which would both be categorized as ________ factors.

Product planners need to consider products and services on three levels. Each level adds more customer value. The most basic level is ________, which addresses the question, "What is the buyer really buying?"