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.