Which AS path access list is used by a multihomed customer to only announce their own address space to their service providers to prevent the multihomed customer from becoming a transit AS?

Which AS path access list is used by a multihomed customer to only announce their own address space to their service providers to prevent the multihomed customer from becoming a transit AS?
A . ip as-path access-list permit.*
B . ip as-path access-list permit^$
C . ip as-path access-list permit _$
D . ip as-path access-list permit _^
E . ip as-path access-list permit local-as ip as-path access-list deny *
F . ip as-path access-list deny.*
ip as-path access-list permit *

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Answer: B