A somatic cell performs many tasks at once. Which is the most important factor that allows these cells to keep accomplishing their many tasks?

A. New cells are continuously
being made from old ones in the process of meiosis.
B. Cells contain DNA from two individuals, and the combined DNA is constantly resulting in genetic variation.
C DNA is transcribed into RNA,
and RNA is translated into proteins.
D. Cells are constantly
producing usable forms of energy in the form of ATP.