#1Based on interdependency, to make the hotel "work," you must have:A. ProfitB. TeamworkC. SalesD. GuestsE. None of the above

To address the question properly, let's analyze the options provided regarding what is essential for a hotel to "work":

1. Profit: While profit is important for any business to survive and thrive, it is not the primary foundation on which a hotel operates.

2. Teamwork: Teamwork is certainly vital in ensuring that all staff members work together effectively, providing a better service experience for guests.

3. Sales: Sales are important, as they generate revenue; however, sales alone do not guarantee a hotel's success without guests to purchase services.

4. Guests: Guests are arguably the most critical component of a hotel’s operation. Without guests, there are no sales, no revenue, and thus no profit.

5. None of the above: This option would imply that none of the prior components are necessary, which doesn't align with the business operational needs.

Conclusion:

Given the interdependency among all aspects of a hotel's operation, the most critical factor that enables the hotel to "work" effectively is D. Guests. Without guests, the hotel cannot function, as they are the primary source of income and the reason for the hotel's existence.