What will the following API call return?

http://twitter.com/blocks/destroy/john.xml

It will block john from the authenticating user.

It will un-block john for the authenticating user.

It will display all of john's blocked users.

It will display all of john's un-blocked users.

Answer:
It will un-block john for the authenticating user.

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What will the following API call return?http://twitter.com/blocks/destroy/john.xml