An EMC Data Domain customer has been achieving a compression ratio of 14:1 for database backups over the past year. Two weeks ago the aggregate compression dropped from 14:1 to 4:1.
What is a possible cause for this change in compression?

A.
User changed from single-threaded backups to multiplexed backups

B.
User changed from five backups per week to seven backups per week

C.
User changed the time backups start

D.
User changed from a 1 GB NIC to a 10 GB NIC