Differentiation Focus Strategy Refers to One of Porter's Generic Business

Differentiation focus strategy refers to one of Porter's generic business strategies that

A) involves controlling expenses and, in turn, lowering product prices targeted at a narrow range of markets segments.
B) focuses on reducing expenses and, in turn, lowers product prices, while targeting a broad array of market segments.
C) requires products to have significant points of difference to target one or only a few market segments.
D) requires products to have significant points of difference to charge a higher price while targeting a broad array of market segments.
E) seeks opportunities by finding the optimum balance between marketing efficiencies versus R&D-manufacturing efficiencies.