Which of the Following Is Not a Key Step in the Activation

Multiple Choice

Which of the following is not a key step in the activation of mRNA synthesis in eukaryotes?

A) Binding of TBP to the DNA.
B) Binding of other transcription factors.
C) Binding of RNA Pol I.
D) Phosphorylation of the RNA Pol.
E) All of these are necessary to initiate RNA synthesis in eukaryotes.