使用urllib库发起http请求（post方法）时，下列用法正确的语句是（）。

A request = urllib.request.Request(url

Bheaders=headers

Cdata = payload_encode

Dmethod='POST')r= urllib.request.urlopen(request)[|] request = urllib.request.Request(url

Eheaders=headers

Fdata = payload_encode

Gmethod='POST')[|] request = urllib.request.Request(url

Hheaders=headers

Idata = payload_encode)r= urllib.request.urlopen(request)[|]r= urllib.request.urlopen(request)