It Is Possible to Take Some Specific Cells from a Plant

It is possible to take some specific cells from a plant and through various steps produce a whole new plant because what is true?

A) Plants are very simple organisms.
B) All plant cell types are the same.
C) The DNA of plants is very simple.
D) The nucleus of each cell contains all of the genes needed to produce a plant.
E) Plant cells can exchange genetic information.