How does the system connect the country-relevant Legal Entity fields to a country?

Foundation Objects

How does the system connect the country-relevant Legal Entity fields to a country? Note: There are 2 correct answers to this question
A . By association, using the countryOfRegistration.code in the Condition
B . By association, using the countryOfRegistration.code in the Source Filter u Criteria
C . By association, using the 3-letter ISO code of the country in the Destination Iter Criteria
D . By association, using the 3-letter ISO code of the country in the Condition Values

Answer: A, C