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.
Washington D.C and Wakanda
Bad harvests maybe im pretty sure
They grew crops, and started expanding, turning more colonies around into bigger ones, to eventually create the whole 13. They were still under persecution from England, so eventually, they decided to come together and form their own government, and write the constitution.