Organelles in plant and animal cells perform distinct functions within the cell

Which of the following statements describes the function of the nucleus and provides the correct reasoning for why both plant and animal cells have a nucleus?

A. The nucleus contains DNA, the genetic material for the cell. It is found in both plant and animal cells because all cells must have a mechanism for reproduction.

B. The nucleus is responsible for breaking down glucose into energy. It is found in both plant and animal cells because all cells require energy to function.

C. The nucleus is a gel-like fluid that supports and suspends the other organelles in the cell. It is found in both plant and animal cells because all cells require support and protection from the external environment.

D. The nucleus regulates the materials that enter and exit cells. It is found in both plant and animal cells because all cells must take in required materials and get rid of waste products.