Education or health services.
The first one is correct. In a planned economy, also known as a command economy, the state determines prices and allocates resources.
Longitude and latitude help you locate places on a map. For example, 54'40 helps you locate Oregon.
The correct answer here is the option D.
Tet offensive was a major offensive undertook by the Viet Cong along with the North Vietnamese People's Army of Vietnam and it showed the shocked South Vietnam and its American allies that the war was actually far from over. This also led to the loss of the support for the war in the States.