The Cell Cycle Is Controlled in Most Cells by

The cell cycle is controlled in most cells by

A) a series of checkpoints.
B) cell size, when the cell reaches a certain size, it divides.
C) different cells exhibit different control strategies, any of the 4 above can be found in eukaryotic organisms.
D) time- after a certain length of time the cell divides.
E) the completion of one phase which triggers the beginning of the next.