A ceasefire shall be observed throughout South Vietnam as of 2400 hours G. M.T. [Greenwich Mean Time], on January 27, 1973. At the same hour, the United States will stop all its military activities against the territory of the Democratic Republic of Vietnam by ground, air, and naval forces, wherever they may be based, and end the mining of the territorial waters, ports, harbors, and waterways of the Democratic Republic of Vietnam. The United States will remove, permanently deactivate, or destroy all the mines in the territorial waters, ports, harbors, and waterways of North Vietnam as soon as this Agreement goes into effect. The complete cessation of hostilities mentioned in this Article shall be durable and without limit of time. –Paris Peace Accords

What did the US agree to do in the ceasefire? Check all that apply.

stop all military activities immediately
end ground, water, and naval forces
observe the ceasefire throughout the US
wait and resume fighting at a later time
remove and destroy mines