Answer:
Your correct answer should be, democracy.
Explanation:
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Prevent communism from spreading even further in Asia.
Communist troop sanctuaries were located in Cambodia, Nixon fearing the worse for the spread of communism as the Cold War was still in motion. Nixon assumed that the Viet Cong was using bases in Cambodia to attack the American's and South Vietnamese people during the Vietnam war.
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Your answer is 3, the Great Dividing Range
If you look at the photo attached, the Great Dividing Range is on the right, much like the map you provided.
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