Based on the map, why would American military planners want to invade Cambodia?
A) to reinforce protection of Saigon by creating a buffer zone
B) to escalate the war by involving neighboring countries
C) to stop the Viet Cong from using a supply route
D) to have exclusive access to the Mekong River

**The answer to this question is: 
C) to stop the Viet Cong from using a supply route**

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