动词时态与语态错误 — 英语词汇题

下列句子中画线部分含有一处动词时态或语态错误，请选出正确的改法：Since the new laboratory (A. was completed) last March, the research team (B. has been conducting) experiments there, but their findings (C. have not published) in any journal because the data (D. is still being verified) by an independent panel.