9. Your Biology teacher gives you two human cell lines, A and B, which are in G₀ and G₁ phases of the cell cycle, respectively. Which of the following cellular event is true if these two cell lines are stimulated with growth factors to pass the restriction point?
(A)Only the G₀ cell will replicate its DNA;
(B)Only the G₁ cell will replicate its DNA;
(C)Both cells will replicate their DNA;
(D)Neither of the cells will replicate their DNA.