What is it called when countries try to extend their power by taking over markets in other countries

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

What period of history refers to the time when people did not have written records

Is it true the ancient egyptians created a calendar that had 10 days in a week