After making some network changes you power off and then power on your Cisco router. What sequence of events occurs when a router is powered up?（）
A. Perform POST, locate configuration statements, apply configuration statements, locate Cisco IOS software, and load Cisco IOS software.
B. Locate Cisco IOS software, load Cisco IOS software, locate configuration statements, apply configuration statements, and perform POS
C. Test software routines, POST, load configuration files, load Cisco IOS software, test Cisco IOS software.
D. POST, locate Cisco IOS software, load the Cisco IOS software, locate configuration statements, and apply configuration statements.
E. Load and test IOS, load configuration files, test software routines, POS
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