The nurse is reviewing the nutritional assessment of an 84-year-old widowed patient. Which of these factors will most likely affect the nutritional status of this patient?

Geriatric nutritional status is heavily influenced by the social determinants of health and age-related physiological decline. The loss of a spouse frequently leads to social isolation and "tea and toast" syndrome, where meal preparation is neglected. Fixed incomes further limit access to high-protein and nutrient-dense whole foods. A. Living alone on a fixed income: Social isolation and financial constraints are primary risk factors for malnutrition in the elderly. Bereavement often decreases the motivation to cook, leading to poor caloric intake. Economic limitations restrict the ability to purchase fresh, diverse ingredients necessary for health. B. New exercise pattern: While intense exercise increases caloric needs, an 84-year-old starting a pattern typically improves metabolic health and appetite. It is generally a positive factor for nutritional status unless it causes extreme expenditure. It is a less likely cause of nutritional deficit compared to social factors. C. Increase in taste and smell: In reality, aging is associated with a decrease in gustatory and olfactory sensitivity due to reduced receptor density. An increase would actually improve appetite and nutritional intake. Since this physiological change does not typically occur in the elderly, it is not the primary concern. D. Increase in gastrointestinal motility and absorption: Aging is characterized by decreased gastric acid secretion and slowed intestinal transit. An increase in motility and absorption would enhance nutritional status rather than compromise it. This option describes the opposite of normal geriatric physiological changes.