With Respect to Costs for a Client-Server Network, Which of the Following

With respect to costs for a client-server network, which of the following is true?

A) Personal computers used as clients in a client-server network cost about the same as mainframes for the same amount of computing power.
B) More network capacity, which costs more money, is required for client-server networks than for client-based networks.
C) Experts believe that client server architectures can be complex, but that developing application software for host based architectures is usually cheaper.
D) Updating the network with new version of software tends to be less expensive in a client-server network since the software is centralized in one client.
E) None of the above