Which of the following statements is implied by the diagram?

a.
specialized cells, such as bone cells, skin cells, red blood cells, and muscle cells, cannot be produced from a single cell.
b.
specialized cells are produced immediately following fertilization, or the fusion of a sperm cell with an egg cell.
c.
since all of the cells in an individual organism come from a single cell, they must all be identical.
d.
even though all the cells in an individual organism come from a single cell, they can specialize into different types of cells.