The imperial presidency as described by Schlesinger is best illustrated by the actions of __________ during __________

Which is an example of a study in which a nonequivalent control-group design could be used?

A) We want to evaluate the effectiveness of an anti-smoking campaign using two different schools. We suspect that one school has a higher rate of smoking than the other. B) A new treatment approach for hyperactivity is to be tested in a special school using three different classes. The classes, however, are at different levels of hyperactivity. C) A company wants to test their employees' attitudes toward work as they may be affected by new work rules. One department is selected as an experimental group, and the other is designated as the control group. However, there is evidence that the first department has more positive work attitudes than the second. D) All of the above

A natural asset of the earth that is available to all is better known as ______.

a. earth commons b. tragedy of the commons c. environmental commons d. global commons