**Core Concept**
Vitamin A supplementation is a critical intervention for preventing and treating vitamin A deficiency, particularly in children. Bitot's spots are a clinical manifestation of vitamin A deficiency, characterized by foamy, triangular lesions on the conjunctiva of the eyes.

**Why the Correct Answer is Right**
The recommended schedule for vitamin A supplementation in children with vitamin A deficiency is crucial to prevent further progression of the disease and promote recovery. The World Health Organization (WHO) recommends a series of high-dose vitamin A supplements administered over a period of 2-3 days. This schedule is designed to rapidly replenish vitamin A stores in the body and promote healing of Bitot's spots.

**Why Each Wrong Option is Incorrect**
* **Option A:** Administering vitamin A once or twice may not be sufficient to restore vitamin A levels and promote recovery, making it an inappropriate schedule for this child.
* **Option B:** A schedule of vitamin A administration that is too prolonged may lead to unnecessary side effects and toxicity, particularly if the child's vitamin A levels are already elevated.
* **Option C:** Administering vitamin A without proper monitoring and follow-up may lead to inadequate treatment and persistent vitamin A deficiency.

**Clinical Pearl / High-Yield Fact**
The WHO recommends a schedule of 100,000 IU of vitamin A on the first day, followed by 50,000 IU on the second and third days, for children with vitamin A deficiency.

**Correct Answer:** C.