The correct answer is C. To manage the daily work of the UN
Explanation:
The secretariat of the United Nations is considered as one of the most important organs of the United Nations and part of the executive arm of it, which means the secretariat deals with the day-to-day management or running the organization by organizing the agenda for the rest of the organs in the UN such as the Security Council or the General Assembly and in general the agenda of the organization. Because of this, the secretariat is in charge of managing the daily work of the UN.
