Which of the Following Is the Correct Order of Chromatin

Which of the following is the correct order of chromatin folding?

A) nucleosome formation,30 nM fiber formation,radial loop structure
B) radial loop structure,30 nM fiber formation,nucleosome formation
C) 30 nM fiber formation,nucleosome formation,radial loop formation
D) 30 nM fiber formation,radial loop formation,nucleosome formation
E) nucleosome formation,radial loop formation,nucleosome formation