Which of the following tools can be used to securely connect to a remote system?（）

A. Computer Management Utility
B. Add/Remove Programs
C. Autoexec.bat file
D. MSCONFIG

A. Out-of-date BIOS
B. Invalid motherboard jumper settings
C. Failing power supply
D. Floppy disk in the drive

A.-l
B.-a
C.-t
D.-f