Final answer:
Potassium is the nutrient from the given options that is considered a major mineral, which is required in amounts larger than 100 milligrams per day.
Step-by-step explanation:
The nutrient that is considered a major mineral from the options provided is Potassium (A). Major minerals are classified as those required in the diet in amounts larger than 100 milligrams per day. These include sodium, potassium, chloride, calcium, phosphorus, magnesium, and sulfur. Potassium, along with other major minerals such as calcium and phosphorous, plays critical roles in the body, including the hardening of bones and various physiological processes. It is important to consume a varied diet to meet an individual's nutrient needs and ensure adequate intake of these minerals.