关于联动无负荷试车，下列说法错误的是( )。

A．由承包人组织

B．试车合格，工程师签字

C．发包人按要求做好准备工作

D．由发包人组织

E．双方签字确认试车合格

All the following are benefits of fast tracking a project EXCEPT ______ .

A．facilitates duration compression

B．reduces risk

C．ensure activities are done in parallel which would normally be done in sequence

D．helps shorten the project schedule without changing the project scope