B.to help dispose of sewage because houses were important in building baths and sewage structures
The correct answer is Setting Foreign Policy
Explanation: In Foreign Policy countries relate in a thoughtful and planned manner according to their interests and goals. This planning is called foreign policy. Foreign policy is a public policy, a defined set of measures, decisions and programs used by the government of a country. The objective of this policy is to design and direct your political actions abroad.
A foreign policy may have concrete objectives, for example, by seeking negotiations or the establishment of trade agreements. But it can also have abstract goals, such as a political and cultural approach, for example, by forming dialogue forums and symbolic meetings.
Copernicus served as a Church canon and at the same time he works on various activities. While doing all his responsibilities he always say to it that his actions for a specific task is not influenced by other aspects of his life. For instance, while serving as a canon, he managed to do astronomical observations and research on things.