Which of these is the best definition of "civilization" for a history class?

a) the way people talk
b) a group that has a culture
c) the ability to walk upright
d) how sophisticated people behave

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