A teen avoids fortified dairy and rarely goes outside in winter. They begin to feel leg soreness during...

A teen avoids fortified dairy and rarely goes outside in winter. They begin to feel leg soreness during long walks. What process is most likely affected?
Nerve signaling in cold weather can feel slower, but it is not directly affected by limited vitamin D intake.
Calcium absorption that depends on vitamin D.
The ability to balance electrolytes.
Glucose storage in muscle fibers may influence energy levels, yet it does not explain the soreness linked to low vitamin D.