Complex sentence: The alternative came under criticism from rail transit advocates, who argued that the plans to use DMUs would require a transfer for Bergen commuters, would not be efficient, and that the original plans should be implemented instead.
Split into simpler sentences: The alternative came under criticism from rail transit advocates, who argued that the plans to use DMUs would force a transfer for Bergen County commuters, and would not be efficient. They argued that the original plans should be implemented instead.