Which of the Following Is a Key Regulatory Event for Regulating

Multiple Choice

Which of the following is a key regulatory event for regulating transcription initiation?

A) controlling the transition between the inactive and active states of chromatin in the region of H2B histone
B) controlling the transition between the inactive and active states of chromatin in the region of introns
C) controlling the transition between the inactive and active states of chromatin in the region of a promoter
D) controlling the transition between the inactive and active states of chromatin in the region of exons