It would be mainly that "<span>D. More than one person wishes to control the same piece of land" that generally </span>has been the main cause of land grant disputes over time, since land is of course limited and very valuable.
Answer:
Yes, Martin Luther King for example. In America one can refuse ones entry somewhere because of someones color.
Washington called his strategy 'war of posts'.
In absentee voting a person obtains a ballot from his county election officer either in person beforehand or by mail.