Which of the following statements accurately explains why subsequent boundaries are the most common type of boundary? (AP Human Geography Question)
a. The process of establishing them happens before people settle in the area
b. The process of establishing them does not take cultural differences into account
c. The process of establishing them is lengthy and related to territoriality
d. The process of establishing them connects to previously set boundaries
e. The process of establishing them correlate to the devolution of territories

Please explain the answer, and I'll award brainliest =)