Several major power companies in country T recently announced that they will abandon domestic coal unless the price of domestic coal is reduced. The spokesman said that the price of imported coal has fallen to less than $ 100 per ton, and the price of domestic coal is still high. According to industry insiders in the coal industry, once coal prices continue to fall, small and medium-sized coal mines will struggle to survive, and the driving force of large coal mining companies will be seriously insufficient, and the entire domestic coal production industry will face a grim situation. At present, the situation of domestic coal production enterprises is already grim. Which of the following facts must the judgment of the industry have? ['Domestic coal companies have reduced coal production during this period.', 'Domestic coal prices remain high in the country.', 'Domestic coal has no advantage in price competition with imported coal.', 'Several major power companies in the country have not given up buying domestic coal.']