What two effects can influence factorial designs?

Which of the following is a service that is almost entirely government-provided in other developed countries, but only partially government-provided in the U.S.?

A) roads B) military defense C) health care D) education E) flood control

Explain how, although federal spending over the past half-century has increased by 670% in real (inflation-adjusted) dollars and federal programs and activities have also increased, the federal workforce has scarcely grown at all.

What will be an ideal response?