All of the Following Are Principles of Data Replication in a Distributed

Multiple Choice

All of the following are principles of data replication in a distributed database network, except ____.

A) place a copy of every table at a central node to avoid having a bottleneck
B) place copies of tables at the sites that use them most heavily in order to minimize telecommunications costs
C) ensure that there are at least two copies of important or frequently used tables to realize the gains in availability
D) limit the number of copies of any one table to control the security and concurrency issues
E) avoid any one site becoming a bottleneck to maintain performance