D. The Speaker of the House.
While technically it would be the Vice President, he does not usually spend anytime at the Capitol, so it would be the speaker.
Q1) Command of the Army act
Q2) Tenure of office act
Q3) Seven Martyrs
Q4) Fifteenth Amendment
D. because none of them explain the true meaning of what you want
Social reformers and journalists
jane adams Jacob Riis and Ida Tarbel
C) market economy: command economy