With Regard to Colonial Land Settlement and the Land Beyond

With regard to colonial land settlement and the land beyond the Appalachians,

A) secure land titles had to come from established authority; land typically could not be claimed simply by "squatting" on it.
B) throughout most of the colonial period, authority over the land beyond the Appalachians was not easy to establish because both the English and the French laid claim to most of the Mississippi watershed.
C) the original grants of land to colonial settlers from the crown had been "from sea to sea."
D) all of the above are true.