The __________ led to the creation of the civil service system, even though it initially covered only 10 percent of the federal workforce

One of the main reasons for the Soviet Union to get involved in Afghanistan in 1979 was

a. better access to oil. b. to defend the indigenous populations. c. to defend the government of Afghanistan. d. to expand its markets region. e. the expansion of its influence in China.

The uncertainty of a public opinion poll is often expressed as _________________.

A. Probability Distribution B. Margin of error C. Interval Estimate D. Confidence Interval