**Core Concept**
Hypercalciuria refers to the excessive excretion of calcium in the urine, which can lead to kidney stones, nephrocalcinosis, or other kidney-related problems. This condition is often associated with disorders that affect calcium homeostasis or bone metabolism.

**Why the Correct Answer is Right**
All the options listed (A, B, and C) can cause hypercalciuria due to their effects on calcium metabolism. Hyperparathyroidism (A) leads to increased parathyroid hormone (PTH) levels, which stimulate the release of calcium from bones and increase its absorption from the gut, resulting in hypercalciuria. Vitamin D intoxication (B) enhances calcium absorption from the gut, leading to increased levels of calcium in the blood and subsequently in the urine. Sarcoidosis (C) can cause increased production of 1,25-dihydroxyvitamin D, which also enhances calcium absorption and leads to hypercalciuria.

**Why Each Wrong Option is Incorrect**
**Option A:** While hyperparathyroidism can cause hypercalciuria, it is not the only condition that does so. Other conditions like hyperthyroidism or certain types of cancer can also cause hypercalciuria.

**Option B:** Although vitamin D intoxication can cause hypercalciuria, it is not the only condition listed that does so. Other conditions like hyperparathyroidism or sarcoidosis can also lead to hypercalciuria.

**Clinical Pearl / High-Yield Fact**
It's essential to consider the differential diagnosis of hypercalciuria, which includes not only the conditions listed above but also other causes such as hyperthyroidism, certain types of cancer, and certain medications like thiazide diuretics.

**Correct Answer:**
✓ Correct Answer: D. All