What measure had the ambassador anticipated the Security Council to take to fulfill the mi

What measure had the ambassador anticipated the Security Council to take to fulfill the mission？

A．Residents were asked to participate in the operation.

B．Troops were brought in to help the African Union.

C．Military forces were required to retreat soon.

D．More fire engines were provided by the United Nations.

请帮忙给出正确答案和分析，谢谢！