Expansion, peak, recession, and trough are all periods of the A. business cycle B. consumer price index C. gross domestic product D. annual percentage change -Please select the best answer from the choices provided BRAINLIEST FOR WHO RIGHT​

Why was frederick douglass encouraged by the dred scott decision?

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Among the many crucial themes related to politics, a central idea of politics includes the existence of