I need help with my homework cuz I don't understand it

Functionalism was a school of psychology that focused attention on the

What words in the preamble to the constitution reflect the principle of popular sovereignty

What does a most-favored-nation (mfn) status mean? a country pays the same tariffs as those paid by all mfn countries. a country has a special exemption from all tariffs in the united states. a country has special licensing agreements with u.s. corporations. a country is exempt from product standards that make it expensive for goods to be imported.