等式（a+b）×c=a×c+b×c是______律的字母表示式．

To manage a project including （）.

A．identity the request and make sure the clarity and achievable aim

B．balance the request of quality，scope，time and fee

C．make the technology regulation explaination，plan and means befit for different requests and expectation of all kinds of stakeholders

D．all of above