Which set of micronutrients correctly lists those with increased RDAs in older adults and correctly pairs them with underlying physiological reasons?

Iron, folate, and vitamin K increase because older adults have higher rates of cell division and need more to sustain rapid growth.

All micronutrient RDAs decrease uniformly after 50 because digestion becomes universally less efficient, requiring less intake across the board.

Vitamin A, potassium, and vitamin C increase due to increased skin breakdown and immune senescence in older adults.

Vitamin D (reduced skin synthesis), calcium (reduced absorption and bone density loss), and vitamin B6 (increased need for metabolic and neurologic processes) — all increase to mitigate osteoporosis and chronic disease risk.