4. A technician is installing four new servers into a 42U rack but does not have the manufacturer's specifications on how to load the rack. The servers are a 4U Web server, a 4U FTP server, a 12U file server, and an 8U database server,
which is quite heavy due to the amount of disk drives installed. Starting from the bottom, in what order should the servers be placed in the rack?
A. File, Web, FTP, database
B. Web, database, FTP, file
C. FTP, file, database, Web
D. Database, file, Web, FTP