Final answer:
The proper capitalization for the soccer coaching association in the question is 'NSCAA' for the National Soccer Coaches Association of America, which should be fully capitalized as it represents a proper noun.
Step-by-step explanation:
Oscar received his coaching license through the NSCAA, our country's soccer coaching association. The correct capitalization for the association's name is 'NSCAA,' which stands for the National Soccer Coaches Association of America.
Whenever using an abbreviation or acronym for a specific organization, it should be fully capitalized, as it is a proper noun. Therefore, the correct way to write it in Oscar's case is 'NSCAA.'