Which Statement Is TRUE Regarding E. Coli RNAP

Multiple Choice

Which statement is TRUE regarding E. coli RNAP?

A) The dissociation constant (K_d) for promoter DNA and the core enzyme is smaller than that for promoter DNA and the associated holoenzyme.
B) The dissociation constant (K_d) for non-promoter sequences and the RNAP holoenzyme is larger than the K_d for the core enzyme and nonpromoter DNA.
C) The dissociation constant (K_d) for promoter sequences and the RNAP holoenzyme is the same as the K_d for the core enzyme and nonpromoter DNA.
D) All of the statements are true.
E) None of the statements is true.