管式炉加热富油脱苯工艺的特点是什么？

The responsibility assignment matrix(RAM) ______ .

A．is used for development of the project budget

B．is developed at the activity level and used to closely link project roles and responsibilities to project network activities

C．is used to show the connections between work that needs to be done and project team member It can show responsibilities at various levels of detail

D．is used to identify accountabilities in individual performance appraisals