Disadvantages of Centralized Databases Are All of the Following Except

Multiple Choice

Disadvantages of centralized databases are all of the following except:

A) they are vulnerable to a single point of failure.
B) when users are widely dispersed and need data manipulations,they can experience transmission delays.
C) when the centralized database computer fails to function properly,all users are affected.
D) much more expensive to set up and maintain than a distributed database.