All Three Domains Bacteria, Archaea, and Eukarya) Follow the Same

Multiple Choice

All three domains Bacteria, Archaea, and Eukarya) follow the same genetic code. Which of the following statements would most likely be accurate given that information?

A) There were no mutations following the evolution of the genetic code.
B) The genetic code evolved before the different domains diverged.
C) The genetic code evolved before DNA replaced RNA as the unit of genetic information.
D) The genetic code evolved three times.