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.