Black marbles resort is a resort in miami. the members of the marketing department of the resort work hard to develop long-term associations with the resort's customers. they call them to receive feedback about their recent visits to the resort and offer huge discounts on their next visit. in the context of the history of american business, the marketing department is most likely using concepts that were popularized during the

Relationship era

Explanation:

Relationship era is defined as the period of time when businesses and organization tend to move towards the long-lasting and reliable relationships with their customers and likelihood.

According to the situation in question, Black Marble Resort is depicting the relationship era of American business's history. Black Marbles resort are trying to establish a relationship with their customers by asking for their feedback, offering discounts etc for long-term..This strategy is stating about the relationship era in which organization were concerned with consumer relationships.

the two sets of lines are :