A. communicate more with the public.
B. employ hi-tech means in research.
C. feel no shame for their cause.
D. strive to develop new cures.
50. From the text we learn that Stephen Cooper is_____.
相关信息句为：
Finally, because the ultimate stakeholders are patients, the health research community should actively recruit to its cause not only well-known personalities such as Stephen Cooper, who has made courageous statements about the value of animal research, but all who receive medical treatment.
A. a well-known humanist.
B. a medical practitioner.
C. an enthusiast in animal rights.
D. a supporter of animal research.
