ap microeconomics question. please help asap! i originally got 5.28 but the site told me that was wrong

What role did radio free europe play in western countries' cold warstrategy?

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment.b. the allocation of resources between private markets and the public sector.c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t.d. differences in productivity.e. ones that think at the margin and respond to incentives and those that don’t.

How do the public-safety regulations protect workers ? regulations create advertising laws