The text provides three primary strategic approaches $($differentiation$,$ cost$,$ and response$)$ for achieving competitive advantage. Provide an example of each. Support your choices.

Choose the correct example of differentiation and its explanation below.

A$.$ Starbucks, as it provides the special atmosphere and aroma of fresh coffee.

B$.$ Hewlett$-$Packard, as it demonstrates flexibility in both design and volume changes in the volatile world of PC$.$

C$.$ Hewlett$-$Packard, as it provides personal computers at the best and cheapest prices.

D$.$ Starbucks, as it provides the best cheap coffees, including canned, ground, fair trade and organic coffees.