Final answer:
The given statement establishes a relationship between the actions of different entities based on necessary and sufficient conditions.
Step-by-step explanation:
The given statement implies that if Regent's enlarges its casinos, it is necessary for Disney to offer games and vice versa, and if Windstar diversifies its activities, it is sufficient for Costa to enlarge its nightspots. Here, enlarging casinos is a necessary condition for Disney offering games, and diversifying activities is a sufficient condition for Costa enlarging its nightspots.
To understand this better, let's assume that Regent's enlarges its casinos. According to the given statement, this would mean that Disney would be required to offer games. Similarly, if Windstar diversifies its activities, it would be enough for Costa to enlarge its nightspots. Therefore, the statement establishes a relationship between these conditions and suggests that the actions of one entity are dependent on the actions of another.