What did electric trains and trolleys mostly replace at the
beginning of the 1900's?
A. horses
B. subways
C. railroads
D. autos

Both the nervous and endocrine systems send electrical and chemical signals for internal communication. select the best answer from the choices provided t f

Which of the following best describes the economic effect that results from the government having a budget surplus?

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.