Which of the following statements is true?

A) Geography and culture of a nation are under human control, while institutions of a nation are outside of human control.
B) Geography refers to man-made factors, and in particular to the organization of society determined by the members of that society.
C) Geography of a nation is not always under human control, while institutions of a nation are man-made.
D) Most of the geography of a nation can be changed over time.

C