Which of these identifies the appropriate expectations to have when emailing an instructor?单项选择题
A
Be patient. Instructors may have several hundred students to deal with.
B
Wait until the last minute to email your instructors. They have to answer you then.
C
Instructors are supposed to respond within one hour, outside of class time.
D
Instructors are in charge. They don't have to respond to you if they don't feel like it.
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