That afternoon, you meet with the owners privately to discuss the data you received. Which of the factors analyzed do you think will most affect the success or failure of the coffee shops?

From the information from the remaining part of the question. The factor that would affect the success or failure of Caffè Gustoso is the Cultural factor.

Explanation:

Caffè Gustoso an Italian word meaning "Tasty coffee". This tells us that the firm is in the food and beverage industry.

Each of the countries mentioned are found in different continents having diverse cultures.

Key to their success is to know the culture of these countries as regards to coffee.