The correct answer is A) to assert and maintain their rights.
According to the protest document, the duty of Americans is to assert and maintain their rights.
The excerpt of the protest document is from the case Chenck v. U.S. 249 U.S. 47 of 1919. On that document was stated that conscription was despotism. On the other side of the document titled “Assert Your Rights”, it read that the Constitution was being violated when “your right to assert your opposition to the draft” was refused to be recognized. That is why the duty of Americans is to assert and maintain their rights.