Stage fright is a mon example of educators call a “lack of confidence” among students.
A. that
B. what
C. which
D. whom
网友回答
A. that
(答案→)B. what
C. which
D. whom
解析：介词of后面是宾语从句，且宾从 educators call a “lack of confidence” among students.中缺少call的宾语，所以选B.