There are four types of validity that affect the rigor of a quantitative study. Which type of validity does a researcher address in choosing to use a true experimental design

According to the graph above, in which location(s) do at least half of people practice christianity? a. zimbabwe only b. nigeria and mali only c. zimbabwe and south africa only d. zimbabwe, nigeria, and south africa only

Which of the following best completes the diagram above? a. land ordinance b. northwest ordinance c. revolutionary war d. shays' rebellion

Which best expresses the radical republican philosophy of reconstruction? a. the confederate states were conquered territories that should be ruled by military governors. b. the southern states actually never left the union. c. if ten percent of the voters of a state that had seceded took an oath of allegiance to the union, then it should be readmitted as a state.