All of These Are True About Product Line Extensions Except

All of these are true about product line extensions except which?

A) This strategy can result in lower advertising and promotion costs.
B) A risk that comes with product line extensions is that sales of an extension may come at the expense of other items in the company's product line.
C) A product line extension raises the level of brand awareness.
D) Line extensions work best when they provide incremental company revenue by taking sales away from competing brands.
E) Product line extensions involve using a current brand name to enter a different product class.