They are used as radio waves, infrared radiation, visible light.
The purpose of sending troops to Vietnam was to prevent Vietnam from becoming a communist state- much like the neighbouring China did. The US feared the domino effect in which more and more neighbouring states become communist.
This policy was called the containment policy (the answer is B) - communism were to be contained.
The answer D. would make the most sense in delivering your lines perfectly.
Scarcity-fundamental economic problem facing all societies that results from a combination of scarce resources and people's virtually unlimited wants
Answer:
D. Room attendant
Explanation:
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