Zhao, Qian, Sun, and Li both have grown-ups and children. When weighing them, Zhao and Qian weighed almost the same weight as Sun and Li; swapped Qian and Li, Zhao and Li The weight of the two was significantly larger than that of Sun and Qian, and the weight of Zhao and Sun was still less than that of Qian. According to the stem information, which of the following is the correct order of weight for Zhao, Qian, Sun, and Li (from heavy to light)? ['Li, Qian, Zhao, Sun.', 'Li, Qian, Sun, Zhao.', 'Qian, Sun, Li, Zhao.', 'Qian, Zhao, Li, Sun.']