From January to June this year, Zhujiang Road is expected to sell 200,000 computers. This is only 45% of sales in the same period last year. It can be seen that this year's Zhujiang Road computer sales will definitely be less than last year. Which of the following is true and will most weaken the conclusion? ['The price of computers in the first half of this year is generally higher than in the same period last year.', 'Computer prices are expected to fall sharply in the second half of this year.', '0% of computer sales are completed in the second half of the year.', 'Computer sales are related to the intensity of publicity.']