How much is world oil consumption expected to change by 2030?

Why are psychological theories often a good source for research ideas?

a. because theories are basically everyday guesses about reality that need empirical verification b. because theories often make specific predictions about relationships among variables that must then be tested empirically c. because theories are usually about esoteric issues with no practical application, and research makes theory more practical d. because theories do not have testable hypotheses

In the 1926 case of Myers v. United States, which of the following was the most important outcome?

a. Executive-branch officials were granted tenure, making it difficult to remove them. b. Presidents retained the authority to remove officials in the executive branch. c. Executive-branch secretaries were placed on year-to-year contracts. d. Executive-branch secretaries were placed under the civil service administration.