问题详情

What does the writer say about the communication options available to senior managers？
A．Sending memos to staff is out of the most efficient methods.
B．It is important to find the time to discuss certain matters with staff.
C．They should increase the range of options that they use.
D．Getting junior managers to talk to staff can create different problems.请帮忙给出正确答案和分析，谢谢！