Which of the Following Must Occur So That the Pre-Initiation

Multiple Choice

Which of the following must occur so that the pre-initiation complex can be converted to the open complex?

A) The C terminal end of the RNA polymerase must be dephosphorylated.
B) The C terminal end of the RNA polymerase must be phosphorylated.
C) The N terminal end of the RNA polymerase must be dephosphorylated.
D) The N terminal end of the RNA polymerase must be phosphorylated.