Why was the 20th first amendment to the us constitution necessary

(05.04 mc) how did the roman transportation system keep the empire strong? plz

How did the actions of tsar nicholas 2 and his wife lead to revolution in russia

Which statements describe how reformers fought for social change in the progressive era? check all that apply. 1. they founded a state university to promote industrialization. 2. they began a civil rights movement to promote equality between races. 3. they made it legal to manufacture and sell alcohol. 4. they built thousands of new schools and required attendance. 5. they promoted abstinence from alcohol and supported prohibition.