What was one result of the growth of suburbs? a. cities became less diverse. b. cities became wealthier. c. cities became larger. d. cities became poorer.

D. is the correct answer

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

the name of the theory is landmass theory.