You are working on a project for Bright Idea Inc．and working on a project for a large retail bank．You have already prepared the WBS and got it signed off．Because of some new government regulations，you need to add some more activities to the WBS．You have got the change requests approved through the CB．The WBS changes in turn require which of the following ？（）

A．Cost change

B．Scope change

C．Schedule revision

D．Risk response chang

2013年9月，习 * * * * 出访欧亚五国，并出席第8次G20峰会和第13次上合组织峰会。此次出访以推动国际合作为主轴，强调国家间的共同发展和利益融合。可见（）

A.合作已成为当今时代的主题

B.国际关系的实质是利益关系

C.我国外交政策以维护我国的主权、安全和发展利益为宗旨

D.我国广泛参加各种国际组织并发挥着主导作用