25 yrs old lady who has been working as a radiology technologist for the last 3 years came to outpatient clinic complaining of fatigability. She is worried as her friends told her that she was not well protected in her job and her repeated exposure to radiation will probably cause cancer. What is the mechanism by which radiation damage cells?

A. Rupture of the DNA strands

B. Alteration of bases

C. Destruction of some sugars

D. Crosslinking and formation of dimers

E. all of the answers are correct