Physician: The rise in blood pressure that commonly accompanies aging often results from a calcium deficiency. This deficiency is frequently caused by a deficiency in the active form of vitamin D needed in order for the body to absorb calcium. Since the calcium in one glass of milk per day can easily make up for any underlying calcium deficiency, some older people can lower their blood pressure by drinking milk. The physician's conclusion is properly drawn if which one of the following is assumed? ['Anyone who has a deficiency in the active form of vitamin D also has a calcium deficiency.', "Older people's drinking one glass of milk per day does not contribute to a deficiency in the active form of vitamin D needed in order for the body to absorb the calcium in that milk.", 'People who consume high quantities of calcium together with the active form of vitamin D and any other substances needed in order for the body to absorb calcium have normal blood pressure.', 'There is in milk, in a form that older people can generally utilize, enough of the active form of vitamin D and any other substances needed in order for the body to absorb the calcium in that milk.']