The mountain ranges on Southeast Asia's mainland shaped the history of the region because the mountains separated the mainland from the rest of Asia and isolated early societies. The correct option among all the options given in the question is option "A".
Under President Johnson’s plan for Reconstruction, the way states could be readmitted to the Union was D. States had to ratify all three Reconstruction amendments.
<h3>President Johnson’s plan for Reconstruction</h3>
This refers to the plans by then-president Johnson to pardon states that wanted to break away and were involved in the American Civil War.
A large part of his plan was to make the states ratify not only the Fifteenth Reconstruction amendments but all of them and outlaw slavery, among many others.
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