In DNA foot-printing,

A. The DNA is labelled by random priming so that the entire DNA is labelled and one does not miss out any region that binds with the given protein.

B. The DNA is end-labelled so that the bands get organized from higher to lower size after electrophoresis and autoradiography.

C. A sequencing polyacrylamide gel is used to resolve all the fragments distinctly.

D. A higher concentration of agarose gel is used to resolve the finer bands.

Which one of the following options has the combination of all correct statements?