Which of the Following Best Explains the Trend Toward Distributed

Which of the following best explains the trend toward distributed systems?

A) Modern business are already distributed, and thus distributed solutions are a natural implementation
Alternative.
B) Distributed computing consolidates the incredible power made possible by the proliferation of personal computers across an enterprise.
C) Distributed system solutions are more user-friendly because they utilize the PC as the user interface processor.
D) Personal computers and network servers are much cheaper than mainframes.
E) all of these