A backup environment has 20 GB of data with 10 percent initial commonality. The data is backed
up to a target-based deduplication system on a full, every day backup schedule. After the first
backup, 5 GB of data is changed. The same data set is backed up every day.
How much data is sent over the network on the first and second backups?

A.
20 GB for the first backup; 20 GB for the second backup

B.
20 GB for the first backup; 5 GB for the second backup

C.
18 GB for the first backup; 4.5 GB for the second backup

D.
18 GB for the first backup; 18 GB for the second backup