Although spinach is rich in calcium, it also contains a large amount of oxalic acid, which can effectively prevent the body from absorbing calcium. Therefore, if one wants to take enough calcium, he must use other calcium-rich foods. Replaces spinach. Which of the following, if true, would most weaken the argument for the problem? ['Rice does not contain calcium, but contains alkaline substances that neutralize oxalic acid and alter its properties.', 'Calcium in dairy products is higher than spinach, and many people who regularly eat spinach also consume dairy products.', "In people's daily diet, in addition to spinach, in fact, a large number of vegetables contain calcium.", 'In addition to calcium, spinach also contains other rich nutrients; in addition, oxalic acid only prevents the body from absorbing calcium, and does not prevent the absorption of other nutrients.']