Which of the following customer requirements is the TS7650G Gateway designed to address?（）

A.18 virtual libraries, 64 virtual tape drives, and 55,000 virtual tape cartridges 
B.6 virtual libraries, 128 virtual tape drives, and 110,000 virtual tape cartridges 
C.12 virtual libraries, 256 virtual tape drives, and 128,000 virtual tape cartridges 
D.24 virtual libraries, 512 virtual tape drives, and 256,000 virtual tape cartridges 

A.12 
B.16 
C.20 
D.24

A.latency across a long distance network 
B.high-speed backup of large video files 
C.increase levels of data protection with enterprise class data integrity 
D.improve backup and recovery operations without changing existing backup processes,procedures or policies