The correct option is A Interphase
In cell cycle, changes of interphase stage are not visible under microscope because interphase is the phase of the cell cycle in which the cell spends and performs the majority of its time. Then, in preparation for cellular division, it increases in size. Interphase is also considered to be the living phase of the cell, in which the cell obtains nutrients, grows, reads its DNA, and conducts other normal cell functions.