Which of the following is the main reason that a typical eukaryotic gene is able to respond to a far greater variety of regulatory signals than a typical prokaryotic gene or operon? A. Eukaryotes have three types of RNA polymerase. B. Prokaryotic genes are packaged into nucleosomes. C. Eukaryotic RNA polymerases require general transcription factors. D. The transcription of a eukaryotic gene can be influenced by proteins that bind far from the promoter.