A focused differentiation strategy aims at securing competitive advantage by

A$)$ providing niche members with a top$-$of$-$the$-$line product at a premium price.

B$)$ catering to buyers looking for an upscale product at an attractively low price.

C$)$ offering a product carefully designed to appeal to the unique preferences and needs of a narrow, well$-$defined group of buyers.

D$)$ developing product attributes that no other company in the industry has.

E$)$ convincing a narrow, well$-$defined group of buyers that the company has a truly world$-$class product.

C$)$ buyers cannot integrate backward into the product market of sellers.

D$)$ sellers' products are differentiated, making it easy and inexpensive for buyers to switch to competing brands.

E$)$ the industry's products are standardized or undifferentiated.