Answer: When the sentence contains a conjunction
Explanation: I learned this like 3 years ago
If you work for a government agency that regulates the buying and selling in the country, then the main purpose that you agency is serving would be "<span>A. Distribution of resources," since this would take the place of a more traditional market system. </span>
The main purpose of the Department of State (also known as the State Department) is "<span>c. to serve the President as an advising body on issues of foreign state relations," since this would be impossible for the President to do by himself. </span>