What led to the industrial nullification crisis, and why was it important

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Which statement best explains how world war ii to end the great depression? a. new job opportunities opened as the united states produced more military products. b. the u.s. army provided new jobs that paid better than any other work at the time. c. people had to worry more about war problems than about the economic crisis. d. the war caused people to trust the economy enough to spend more money.

What is one example of economic policy? a. a state government increasing tax rates b. a neighborhood group collecting money to build a playground c. a city building a new school d. a company giving high-performing employees a raise