**Core Concept**
The question is testing the student's understanding of the physical properties of gases, specifically the concept of liquefaction and the behavior of gases under different conditions. The correct answer requires knowledge of the thermodynamic principles that govern the behavior of gases.

**Why the Correct Answer is Right**
The correct answer is related to the concept of liquefaction of gases, which occurs when a gas is cooled to a temperature below its critical temperature. At this temperature, the gas molecules slow down and come together, forming a liquid. This process is governed by the ideal gas law, which states that the temperature of a gas is directly proportional to the average kinetic energy of its molecules. When a gas is cooled, its temperature decreases, and the average kinetic energy of its molecules also decreases, allowing the molecules to come together and form a liquid.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the conditions under which a gas can be stored in liquid form. The correct answer requires knowledge of the critical temperature and pressure of a gas.
**Option B:** This option is incorrect because it is too vague and does not provide any specific information about the physical properties of gases.
**Option C:** This option is incorrect because it is not relevant to the concept of liquefaction of gases.

**Clinical Pearl / High-Yield Fact**
One important point to remember is that the critical temperature of a gas is a fundamental property that determines its behavior under different conditions. Understanding the critical temperature of a gas is crucial in various fields, including chemistry, physics, and engineering.

**Correct Answer:** C.