下列操作中，不符合套利交易行为特征的有（）。

A.不要用套利来保护已亏损的单盘交易

B.由于套利交易的低风险与低保证金等特点，因此可以超额套利

C.套利交易指令下达时可以先后报出买入与卖出期货合约的价格

D.套利开仓时要同时买入与卖出，平仓时可以根据情况先平仓获利盘

The former head of your project office recently fell to his death during a Mount Everest summit attempt. You are the new head of the project office. You are eager to “run the show” because of ongoing confusion in your organization regarding project plans and schedules. Unfortunately, many project managers believe the plan is the schedule. You realize that the plan is much more than a schedule and have decided to issue guidelines concerning items that should compose project plans. Your guidelines state the WBS ______ .

A) does not need to be included in the plan because it would be reflected in the schedule
B) should be included as part of the scope management plan
C) should be developed, but only to the second level
D) should be developed to the level at which control will be exercised