The correct answer is C. Federal troops were removed from Georgia for the final time in 1870.
Federal troops occupied the state until 1870. In 1868, Georgia was readmitted into the Union as a US state. However, in 1869, it was expelled, for refusing to ratify the Fifteenth Amendment to the US Constitution, that allowed African-American men to vote. Then, more than half of Georgia's population was African-American. It was only in 1870 that Georgia would ratify this amendment, and readmitted into the Union on July 15, becoming the last state of the former Confederation to be admitted. With this last admission, the federal troops withdrew from the state.
