Which of the Following Is True About Cloud Computing

Which of the following is true about cloud computing?

A) Cloud firms often have wasteful excess capacity to account for service spikes.
B) Cloud computing is not as green as traditional computing.
C) Cloud firms are often located in warehouse-style buildings designed for computers, not people.
D) Cloud firms are usually crammed inside inefficiently cooled downtown high-rises.
E) Cloud computing firms often have data centers that are not designed to pool and efficiently manage computing resources.