What is meant by focused differentiation? $*$

$1$ point

A$)$ Concentrating on a particular feature of a product or service to achieve differentiation

B$)$ Simultaneously seeking to achieve differentiation and a price lower than that of competitors

C$)$ Providing a high perceived value service or product to a selected market segment that justifies a substantial price premium.

D$)$ Concentrating on differentiation as the primary means of achieving competitive advantage