At a point during a cell's development, it begins to differentiate. How does differentiation occur?
A.
As a cell matures, genes that are not necessary to its function are ejected out of the cell through active transport.
B.
A developing cell's function is determined by the number of organelles that are contained in the cell.
C.
Certain genes are turned on and others are turned off; this action produces adult cells that are specialized.
D.
The number of chromosomes in the cell is reduced by half; this action triggers the specialization of the cell.