The Classic Experiment That Examined DNAse I Sensitivity of Chicken

The classic experiment that examined DNAse I sensitivity of chicken embryonic DNA from different tissues and at different developmental stages shows that: (Select all that apply.)

A) the chromatin structure changes in the course of development.
B) the gene expression pattern changes during development.
C) DNAse I sensitivity comes from sporadic mutations occurred during development.
D) DNAse I sensitivity only occurs in chicken but in no other organisms.