**Core Concept**
Iron deficiency anemia is a common nutritional disorder characterized by insufficient iron stores, leading to decreased erythropoiesis and reduced hemoglobin production. The primary goal of therapy is to replenish iron stores and correct anemia through oral or parenteral iron supplementation.

**Why the Correct Answer is Right**
The treatment of iron deficiency anemia typically involves oral iron supplementation with ferrous sulfate or ferrous gluconate, which are well-absorbed forms of iron. These agents work by increasing iron stores in the body, which in turn enhances erythropoiesis and improves hemoglobin production. Parenteral iron therapy, such as intravenous iron sucrose or iron dextran, may be used in cases of severe iron deficiency or intolerance to oral iron.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because iron dextran is a type of parenteral iron therapy that can be used in cases of severe iron deficiency or intolerance to oral iron.
**Option B:** Incorrect because oral iron supplementation is the primary treatment for iron deficiency anemia, and ferrous sulfate is a well-absorbed form of iron.
**Option C:** Incorrect because intravenous iron therapy is used in cases of severe iron deficiency or intolerance to oral iron, not as a first-line treatment.

**Clinical Pearl / High-Yield Fact**
It is essential to note that iron deficiency anemia can be effectively treated with oral iron supplementation in most cases. However, parenteral iron therapy may be necessary in cases of severe iron deficiency or intolerance to oral iron.

**Correct Answer: C.**