You work as a network technician at. Your boss， Mrs. ， is interested in the Spanning Tree Protocol timers. What can you tell her regarding the default STP timers？ （）
A. The hello time is 5 seconds.
B. The forward delay is 10 seconds.
C. The hello time is 2 seconds.
D. The forward delay is 15 seconds
E. The max_age timer is 15 seconds.
F. The hello time is 10 seconds.
G. The max_age timer is 20 seconds.
H. The forward delay is 20 seconds.
I. The max_age timer is 30 seconds.
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