Which factor encouraged Progressive reform efforts in the early 1900s? A. unions coming to agreements with businesses to avoid lockouts
B. transportation improvements that linked sections of the country
C. quotas that were enacted to limit the number of immigrants
D. rapid growth of immigrant populations in urban areas

not sure might be he acquired the entire oregon territory from great britain

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.

us court of appeals for the 11th circuit