How are seral stages when there is an increase in the number of species, change in the diversity of species and an increase in the total biomass?

How are seral stages when there is an increase in the number of specie

1.	How are seral stages when there is an increase in the number of species, change in the diversity of species and an increase in the total biomass?
A.	Disordered
B.	Random
C.	Alternative
D.	Successive
Answer» E.