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

Choose the correct example of differentiation and its explanation below.

A$.$ Hunter Fan, as it guarantees delivery in $3$ days.

B$.$ FedEx, as it guarantees specific delivery schedules.

C$.$ FedEx, as it specializes only in delivering high importance documents

D$.$ Hunter Fan, as it's a premier maker of quality ceiling fans that lower heating and cooling costs for its custorr