Presidents can use a "backdoor" procedure known as a(n) _________to bypass the Senate regarding presidential appointments

Several variables are associated with longer life expectancy

One way to remove the possible effects of per-capita income as a variable is to examine only countries with similar levels of income per capita. This is an example of using: a. the comparative cases method. b. the multiple cases method. c. a control variable. d. quantitative comparative analysis.

The fall of the Berlin Wall, the unification of Germany, and the collapse of the Soviet Union brought to an end the period known as the __________

Fill in the blank with the right word.