Which of the following statements about biogeochemical cycles is true? a.
Biogeochemical cycles are cycles involving only nonliving components.
b.
The rock cycle is a biogeochemical cycle.
c.
Biogeochemical cycles are not an important part of the Earth system.
d.
Carbon, nitrogen, and oxygen cycles are biogeochemical cycles.

Please select the best answer from the choices provided

A
B
C
D