What is an experiment in which neither the participants nor the individuals running the experiment know if participants are in the experimental or the control group until after the results are tallied.

Enlightenment philosophers believed that human civilizations are similar to nature in that they are a. violent and brutal b. wild and unmanageable c. governed by natural laws d. subject to divine power select the best answer from the choices provided a b c d

The soviet union and the united states believed in two very different economic systems. what were the names of each?

Which form of government have the african nations had since independence?