All Burgers Served with Knife, Except?

Explanation:

The subject of this question is related to Business, more specifically, it deals with the food service industry or restaurant menu offerings. Unfortunately, without additional context, such as an actual menu or restaurant policies regarding how burgers are served, it is impossible to determine the correct answer to which burger is not served with a knife in it to hold it all together. This type of question seems to pertain to a specific restaurant's practice or a hypothetical scenario that would be used in a business studies class to discuss marketing or product differentiation strategies in the food industry.