Recently affected by abnormal weather, the grape production in Turpan has been reduced, and the price has increased by 50% compared with the same period last year, which has greatly increased the cost of the winemaking industry. It is estimated that the price of wine will increase significantly from last year. Which of the following, if true, would most weaken the above point:. ['The wine production process has been greatly improved in recent years.', 'The price of grapes last year was the lowest ever.', 'Climate has less impact on grape production than experts estimate.', 'In addition to Turpan, grapes can also be provided in other regions.']