In 009, the sales volume of domestic mobile phones in China was 32 million units, almost three times the sales volume in 2007. The market share also increased from 10.6% to 17.3%, while the average cost decreased from 2400 yuan to 1500 yuan per unit. Therefore, some experts predict that by 2011, the sales of domestic mobile phones will eventually exceed the sales of imported mobile phones. Which of the following, if true, would best support an expert's prediction? ['Domestic mobile phone prices are cheaper than imported mobile phones, and the market demand for domestic mobile phones will continue to rise.', "China's population will reach 1.39 billion, this huge group is the main consumer of mobile phones.", 'A new smartphone independently developed by China is about to be put on the market.', 'The brand has become an important factor affecting the sales of domestic mobile phones.']