问题：

[多选] What are three common reasons why customers are saying that they need to evolve their data center? （）

A . demand among users for access to information anytime, anywhere
B . desire to use the same vender for desktop and server deployments
C . existing equipment has reached and of life
D . increasing operational costs of managing data centers
E . architectures that is inflexible and inefficient
F . selecting best-performing vendors for each individual component