You are assigned as the project manager in a project with an aggressive schedule. During a recent meeting your team complained about the high pressure applied and the many hours of overwork time. What should you do first

A) Try to obtain additional budget and time.
B) Improve team communication and availability of high quality data on risks. Use this information to enable you to make well-founded decisions earlier.
C) The problem might be the customer disturbing project rhythm. Keep him on distance from the team.
D) Apply fast tracking to shorten project duration without additional work.

如图所示用三根长度相同的绝缘细线将三个带电小球连接后悬挂在空中．三个带电小球质量相等，A 球带正电，平衡时三根绝缘细线都是直的，但拉力都为零．则 （　　）

A．B球和C球都带正电荷

B．B球带负电荷，C球带正电荷

C．B球和C球所带电量不一定相等

D．B球和C球所带电量一定相等