nlike a long$-$lasting competitive advantage, a sustainable competitive advantage is one where $\_\_\_\_\_.$

a$.$ organizations have gained an edge by using their resources to provide greater value for customers than their competitors can

b$.$ competitors buy a portion of an organization's market share and use it to improve their market presence, thereby increasing the longevity of their own organization

c$.$ organizations collect and store the resources they require while preventing their competitors from accessing those resources in order to curb competition

d$.$ competitors have tried unsuccessfully to duplicate the advantage and have, for the moment, stopped trying to duplicate it