What kinds of problems did Americans face
at the turn of the 20th century?

Industrial expansion and population growth radically changed the face of the nation's cities. Noise, traffic jams, slums, air pollution, and sanitation and health problems became commonplace. Mass transit, in the form of trolleys, cable cars, and subways, was built, and skyscrapers began to dominate city skylines.

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answer; (a) he was a u.s senator for 38 years;

answer; ///(1) blank; henry clay; (2) blank; secretary of state; (c)is your answer; ///good luck