Deciding upon the most appropriate structure when a firm has international operations depends on the:

"The extent of international expansion " is the correct approach.

Explanation:

The expected expansion of something like a business organization in many areas around the globe across communities.Choosing the right the much more suitable structure whenever a company has overseas operations consists of the following three major contributing factors: severity of overseas operations, category of the strategic plan, as well as the extensiveness of differentiated products.