**Core Concept**
Raloxifene is a selective estrogen receptor modulator (SERM) that acts as an estrogen agonist on bone and lipid metabolism, but as an estrogen antagonist on breast tissue and the endometrium. It is used to prevent and treat osteoporosis in postmenopausal women.

**Why the Correct Answer is Right**
Raloxifene is indicated for the prevention and treatment of osteoporosis in postmenopausal women due to its agonist effects on estrogen receptors in bone, which leads to increased bone density and reduced risk of fractures. This is because estrogen plays a crucial role in maintaining bone health, and raloxifene mimics this effect. Additionally, raloxifene has been shown to reduce the risk of vertebral fractures and other osteoporotic-related complications in postmenopausal women.

**Why Each Wrong Option is Incorrect**
**Option A:** Raloxifene is not indicated for the treatment of hypertension or cardiovascular disease, as it does not have a significant effect on blood pressure or lipid profiles.
**Option B:** Raloxifene is not used to treat endometriosis, as it can actually exacerbate symptoms by acting as an estrogen antagonist on the endometrium.
**Option C:** Raloxifene is not indicated for the treatment of prostate cancer, as it does not have a significant effect on testosterone levels or prostate tissue.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that raloxifene has a black box warning for increased risk of blood clots, including deep vein thrombosis and pulmonary embolism, especially in women with a history of these conditions.

**Correct Answer:** C.