【单选题】

In the following, what is implied based or the professor’s description

A、Guests should say enthusiastic good byes when leaving evening business gatherings early.
B．Japanese consider departures to be disruptive when guests leave business gatherings early.
C．Japanese never consider departures to be disturbing to others when guests leave business gatherings early.
D．Guests are not allowed to leave without goodbyes because Japanese consider departures disruptive to others.