A particular stakeholder has a reputation for making many changes on projects．What is the BEST approach a project manager can take at the beginning of the project to manage this situation ？（）

A．Say“no”to the stakeholder a few times to dissuade him from submitting more change

B．Get the stakeholder involved in the project as early as possibl

C．Talk to the stakeholder's boss to find ways to direct the stakeholder's activities to another projec

D．Ask that the stakeholder not be included in the stakeholder listin

在造福于人类的同时，现代科技运用的问题也凸显出来，这些问题之一表现为安全形势与社会和谐的维护面临新的挑战。具体说来，这些挑战有（）

①各种现代化工具和设备的运行，稍有不慎就会发生灾难性的后果

②工业的发展带来水体和空气污染

③科技发展的不平衡，可能加剧社会的不平等

④生命科学和信息技术的发展，危及人自身的尊严、健康、遗传等伦理问题

A、①②

B、②③

C、③④

D、①③