ETF的特点不包括（）。

A.实物申购赎回

B.二级市场的交易无涨跌的限制

C.一级市场与二级市场并存的交易制度

D.被动操作的指数型基金

What is the woman’s problem

A．She did not enroll on time.

B．She failed to attend the first few classes.

C．She must miss the start of the semester.

D．She doesn’t have regular Internet access.