Help me with these plz and thanks I’m taking the test now

Which of the following accurately describes the workforces of the united states and canada? a. most of the workforce in the united states and canada is employed in the service industry. b. most of the workforce in the united states and canada is employed in the educational field. c. most of the workforce in the united states and canada is employed in manufacturing and mining. d. most of the workforce in the united states and canada is employed in agriculture.

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?

Which country joined the allies because it was a rival of germany?