In your project，you conducted communications requirements analysis to determine sum of information needs for all stakeholders．You have determined and limited who will communicate with whom and who will receive what information．One factor that you considered while doing communications requirements analysis is that for your project，the number of communication channels______．

A．increases in direct proportion to number of people

B．decreases in inverse proportion to number of people

C．increases in exponential proportion when number of people increases

D．none of the above number of communication channels depends on the type of your project

如图所示，将两只灯泡串联在电路中，闭合开关后发现其中一只发光，另一只不发光。下列说法中正确的是（ ）

A．不发光的灯泡灯丝断了

B．两灯比较，不发光的灯泡与发光的灯泡电流一样大

C．两灯比较，不发光的灯泡的两端的电压较大

D．两灯比较，通过不发光的灯泡的电流较小