47. Which of the following correctly describes a difference between RNA and DNA polymerases?(A) RNA polymerases usually do not need a template, while DNA polymerases do.(B) DNA polymerases usually require a primer, while most RNA polymerases do not.(C) RNA polymerases usually synthesize introns, while DNA polymerases synthesize introns.(D) RNA polymerases polymerize from 5' to 3' end, while DNA polymerases polymerize from 3' to 5' end.(E) DNA polymerases usually require the sigma subunit, while most RNA polymerases do not.