I am not going to answer in a paragraph of 125 words, but I will give you the answer to the first question; The United States didn't want another country to fall to communism. They officially got involved after the attack of the Gulf of Tonkin (U.S destroyers were stationed there and a radio came in that said they had been fired upon by North Vietnamese forces). (45 words BTW).
Answer: criollos
Explanation: I don’t have a good explanation but I know that’s the answer.
Im not a 100% but i believe its Popular Sovereignty
Answer:
The answer is opportunity cost
When an option is chosen from alternatives, the opportunity cost is the "cost" incurred by not enjoying the benefit associated with the best alternative choice.
Hope the answer is correct.
It’s D because they worship to various gods