Final answer:
Organizing the ice cream flavors alphabetically would be the most efficient method for Elsa and Olaf's ice cream truck to serve customers quickly, with the alternative of organizing by popularity as a potential method during peak times.
Step-by-step explanation:
Elsa and Olaf, co-owners of the world's largest ice cream truck, are trying to optimize their service by deciding on an efficient way to organize 256 flavors of ice cream. Given the need to serve customers quickly, the most efficient solution would be 1) Organizing the flavors alphabetically.
This method streamlines the search process for both the servers and the customers as the list of flavors displayed on the truck is alphabetical, and customers would generally expect this kind of order. Organizing alphabetically also removes personal bias which could change over time and make the search process inefficient. An alternative could be 4) Organizing the flavors based on popularity depending on customer patterns, which might speed service during peak times when certain flavors are ordered more frequently.