If an attribute instructor_name defined as varchar(3), suppose excuting the following statements: set instructor_name='我是谁'; Then what happened?
A.
instructor_name='我是谁' can not be executed, because the width of the string “我是谁' is too wide to store to the attribute.
B.
instructor_name='我是谁' can be executed, however the length(instructor_name==6.
C.
instructor_name='我是谁' can be executed, and the length(instructor_name==3.