The minimum wage in the U.S. is Multiple Choice a.set at the federal level, and all states abide by that level. b.set at the federal level, but many states set their own minimums that are higher than the federal level. c.set at the federal level, but many states set their own minimums that are lower than the federal level. d.set at the state level, not by the federal government.

(b) set at the federal level, but many states set their own minimums that are higher than the federal level

Explanation:

The minimum wage of the United States is set by the US labor law and range of state and local laws at federal level. However, many states set their own minimum wages which are usually higher than that set by the federal government. Hence, workers are paid with the highest minimum wage prescribed by federal, state, and local law.

Furthermore, twenty-nine (29) states and D.C in the United States have minimum wage higher than the federal level as of January 2020. Which is either set through legislative action or referendum in most cases

Experimenter, participant expectation

Explanation:

When a research study conforms to a particular set of conditions, hypothesis or the researcher's bias expectations, the research result is said to reflect experimenter expectation. A participant expectation results as an outcome of bias introduced into a research study by the participants for example when a participant want to please the researchers, or develop their own ideas about the topic of the research