Answer:
C). Limiting the amount of Brazilian sugar that can be imported.
Step-by-step explanation:
As per the question, if the United States government places a quota on the amount of sugar imported from Brazil, it would be called physically 'limiting the amount of Brazilian sugar that can be imported'. The imports are restricted for several reasons and the most common reason is to encourage the sale of domestic products and promote domestic trade to boost the local producers instead of heavily relying on imports. Therefore, option C is the correct answer.