How does the SLM-C indicate the cancellation of location reporting triggers configuration in an HTTP POST request?
By including a <cancel> element in the MIME body
By setting the Content-Type header field to 'application/json'
By including a <configuration> element without any child elements in the MIME body
By setting the Content-Type header field to 'application/xml'
By including a <trigger-configuration> element in the MIME body