列式不计算：

①一卷彩带2m，做一个花环要用4/5m，10卷这样的彩带可以做多少个花环？

②李叔叔录入一篇论文，3小时录入了2/5．照这样的速度，工作6小时，可以录入这篇论文的几分之几？

Stakeholder management refers to managing communications to satisfy needs of, and resolve issues with,project stakeholders. The ( ) is useful responsible for stakeholder management.

A.PMO

B.CIO

C.CCB

D.PM