The following is a partial configuration of a router. Which part of the configuration description is correct?

The following is a partial configuration of a router. Which part of the configuration description is correct?

ip IP- prefix pl permit 10.0. 192.0 8 greater-equal 17 less-equal 18
A . In the 10.0.192.0/8 network segment, the route with a mask length of 18 will be matched to the prefix list, and the matching rule is allowed.
B . In the 10.0.192.0/8 network segment, the route with a mask length of 19 will be matched to the prefix list, and the matching rule is allowed.
C . In the 10.0.192.0/8 network segment, the route with a mask length of 20 will be matched to the prefix list, and the matching rule is allowed.
D . In the 10.0.192.0/8 network segment, the route with a mask length of 21 will be matched to the prefix list, and the matching rule is allowed.

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Answer: A