Which of the following activities would make data centres more energy efficient? a) Consolidate systems
onto a smaller number of servers.
b) Position servers as close together as possible.
c) Ensure hot and cold airflows do not mix.
d) Retire all unused and unnecessary data storage capacity.

A.
b and d only.

B.
a, c and d only.

C.
b, c and d only.

D.
a, b, c and d.