Moreover,27.6 percent of those preferred reading on their mobile phones, which was 4.6 percent higher than last year.
Asurveying
B. to survey
Csurveyed
Dhaving surveyed
网友回答
A. surveying
B. to survey
(答案→)C. surveyed
D. having surveyed
解析：考察分词用法。Those与survey构成被动关系，表示被调查的那些人。故C正确。句意：而且在被调查的人中有百分之27.6更喜欢用手机阅读，比去年高了4.6个百分点。