单选题 The initiative is supported by privacy advocates, but has been criticized by researchers and industry ______, who argue that it would create damaging barriers to the use of patient information in research.

【正确答案】 C
【答案解析】[注释]此题目是语义判断题目，选项[C]意指“说客”、“专门受雇对议员进行疏通的人员”，最符合题意。