The yeast Saccharomyces cerevisiae is particularly useful for genetic analysis of cell-cycle control because

A) it is prokaryotic,allowing it to divide rapidly.
B) mutant yeast cells form cancerous tumours.
C) reproduction by budding allows easy identification of the cell-cycle stage.
D) all cells in a culture remain at the same stage of the cell cycle.
E) yeast cells lack G₁ and G₂ stages.