Last year's National Day sales in a shopping mall for two days was 20 million yuan. This year the mall is expected to achieve 70 million yuan in sales during the National Day is not a problem. Which of the following best supports the above reasoning? ['During the National Day of the previous year, the sales in the first 5 days reached 50 million yuan.', 'During the National Day, shopping in the mall became the main choice for people.', 'The mall not only has convenient transportation and a comfortable shopping environment, but also has high-quality products and warm and considerate services. Locals like to shop at the mall.', 'During the National Day each year, the mall found that the daily sales were similar.']