Usage of /questions/{id}/close/options GET
Discussion
Returns the flag options that make up close reasons that the user identified with an access_token can create for this question. Available flags vary from post to post and user to user, an app should never assume a particular flag can be created without consulting this method.
Conceptually, closing is a subset of flagging. To cast a "close vote" you use the /questions/{id}/flags/add method.
This method returns the available flag_options.
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