The right answer for the question that is being asked and shown above is that: "D. voters in a state should decide whether or not to stay in the union." Popular sovereignty was a policy stating that v<span>oters in a state should decide whether or not to stay in the union.</span>
<span>A turning point is a specific, significant moment when something begins to change. Turning point in the history is an event followed by big and important change (political change, social change, ...). </span>Periodization is determining why and how historians divide up history.
Turning points are important in the process of periodization because <span>they mark the beginning and ending of different periods (C).</span>
The answer would be C. Constantinople
