Answer:
B. The spinning motion of Earth.
I would say C because A is a positive, B is a positive, and D is a positive, The only "disadvantage" is in C
1- starts with bare rock
2- takes longer than Secondary succession
3- Volcanic eruptions, glaciers, explosions etc are some ways it starts
4- starts after a disturbance
5- it’s the process of changes in an ecosystem
I hope those are good!
