Russia's economic development is complicated most by?
a) a shortage of energy resources
b)an influx of skilled immigrants
c)great distances separating resources from markets
or
d)harsh climates that make most of the land ill-suited for farming

What does it mean to say that "service sector" jobs are predominant in europe's mixed economies today? a. that jobs where people work in factories predominate b. that jobs where people do something for others predominate c. that jobs where people work the land predominate d. that jobs in government predominate