Answer:a) G2
Step-by-step explanation:
During the cell cycle, the G2 phase is the stage that is important for the cell to prepare for the M-phase, also known as mitosis. In the G2 phase, the cell undergoes further growth, replicates its organelles, and synthesizes necessary proteins to ensure that it is adequately prepared for the subsequent M-phase. This includes the duplication of DNA during the preceding S phase and the proper organization and packaging of genetic material to ensure accurate cell division during mitosis. Therefore, G2 is the phase where crucial preparations occur before entering the M-phase.