Which of the following is true of change in business communication?

A$.$ Undertaking company's training courses can help in staying abreast in one's profession.

B$.$ College programs can teach everything one needs to know about working life.

C$.$ Communication skills become less important while one climbs a career ladder.

D$.$ Reading professional websites does not help in keeping up with professional changes.

E$.$ Change which involves changes for the better is free from stress.