As shown in the figure, the two switches use the default parameters to run STP. On Switch A, the configuration command STP root primary is used. On the switch B, the configuration command STP priority 0 is used.
Which of the following ports will be blocked?
A . G0/0/2 of switch A
B . G0/0/1 of switch B
C . G0/0/1 of switch A
D . E0/0/3 of HUB
Answer: A