D or G
D gets you most of Middle Eastern, all of India, most of China, all of South Asia, most of Australia, most of Japan. Huge variety, extremely high number of options, lots of spice availability, lots of meat and nonmeat protein options.
G mostly because of Mexico alone. I’ve traveled there a bunch recently and the food game is insane. You also get the US South (which does have a lot of great food outside of deep fried everything), Spain, Portugal, and Morocco.
C gets an honorable mention mostly because of southeast Europe. That whole area has been a crossroads for a very long time.
Could it be your carrier somehow doing that? I’ve literally never had that happen