Embryonic stem cell research, a field many researchers believe that is capable of revolutionizing medicine by treatments that develop the regeneration of human tissue, has been controversial in the United States because of ethical and religious questions arising from the destruction of human embryos.


A. a field many researchers believe that is capable of revolutionizing medicine by treatments that develop the regeneration of human tissue 

B. which many researchers believe is capable for revolutionizing medicine by developing treatments for regenerating human tissue

C. a field that many researchers believe is capable of revolutionizing medicine through the development of treatments based on the regeneration of human tissue

D. which many researchers believe is capable to revolutionize medicine based on developing treatments of human tissue regeneration

E. a field that most researchers believe has the capability of revolutionizing medicine that is based on developing treatments of human tissue by regeneration
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