Why did the United States support south Vietnam

Which two sentences in this passage talk about china’s efforts to curb environmental degradation?

Which application of a new technology can be attributed to an invention of thomas edison?

Which of the following is an example of a concurrent power? a. when a group of states work together to regulate interstate commerceb. when a federal law enforcement agency state policec. when a state creates a treaty with a foreign governmentd. when a local government collects taxes on imports