What is a basic requirement that a scientific hypothesis must have?

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 percentage of people are left handed?

Compare and contrast walden and "the experiences of the a.c." include the authors, their ideas, and reasons of their failures from a christian perspective.