Which One of the Following Describes an Event That Takes

Which one of the following describes an event that takes place during gene regulation at the level of the chromosome?

A) Chromatin becomes condensed in order for transcription to begin.
B) Chromatin coils so it can become more accessible to the proteins that carry out transcription.
C) RNA polymerase and associated proteins bind to nucleosomes.
D) Chromatin is remodeled and nucleosomes are repositioned so that specific regions of the DNA are made available for transcription.
E) Cytosine bases in the sequence near the promoter of a gene become methylated in order to stimulate transcription.