I think their historical beginning is fabrication, but I think it started as Chinese. It travelled through two countries since and admits to having changed from it's original form. If I were classifying it NOW I wouldn't call it "kung-fu" as that seems to imply "one level" of removal from China to the kung-fu elitists. I'd call it kuntao, but as that's not an option and none of my qualifiers were available in the list I had to vote "authentic TCMA".