How did these early settlements interact with each other?

Need this !how did the war of 1812 contribute to an increase in u.s. manufacturing? a) the war provided more resources for factories to increase production. b) the war promoted trade between countries so that americans could focus on fighting. c) the war cut americans off from their previous supply of imported manufactured goods. d) the war limited transportation in america, making it necessary to import manufactured goods.

Which of the following statements is true of cause and effect relationships

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