Which of the following signs and symptoms is associated with hyperparathyroidism?

Rationale: A. Hyperparathyroidism causes elevated parathyroid hormone (PTH) levels, which lead to hypercalcemia. High calcium levels can slow smooth muscle activity in the gastrointestinal tract, resulting in constipation. Other gastrointestinal symptoms may include nausea, vomiting, and abdominal pain, all related to calcium imbalance. B. While hypercalcemia can cause nonspecific symptoms like fatigue or mild cognitive changes, severe headaches are not a primary manifestation of hyperparathyroidism. Headaches may occur due to other causes but are not diagnostic for this condition. C. Hyperparathyroidism typically slows GI motility rather than increasing it. Diarrhea is not associated with hypercalcemia; in fact, constipation is more common. D. Hyperparathyroidism does not directly cause weight gain. Some patients may experience loss of appetite or fatigue due to hypercalcemia, but weight gain is not a characteristic symptom.