**Core Concept**
Platlet storage requires precise conditions to maintain their viability and functionality. Platlets are stored at room temperature with agitation to prevent agglutination and maintain their responsiveness to aggregating stimuli.

**Why the Correct Answer is Right**
The correct answer is a temperature range of 20-24°C with gentle agitation. This condition allows platlets to remain viable for up to 5-7 days. The agitation prevents platlet clumping and maintains their responsiveness to aggregating stimuli, such as adenosine diphosphate (ADP). The storage at room temperature also reduces the risk of hypothermic injury to the platlets.

**Why Each Wrong Option is Incorrect**
* **Option A:** Refrigeration at 4°C can activate platlets and lead to their early consumption, making this option incorrect.
* **Option B:** Freezing platlets causes their structural and functional damage, leading to a loss of viability and responsiveness.
* **Option C:** Storage at high temperatures above 24°C can lead to platlet activation and consumption, making this option incorrect.

**Clinical Pearl / High-Yield Fact**
It's essential to note that platlet storage conditions can vary depending on the institution and the specific platlet product. However, in general, room temperature storage with agitation is the standard practice.

**Correct Answer: D. 20-24°C with gentle agitation**