**Core Concept**
DNA (deoxyribonucleic acid) is a double-stranded helix that serves as the primary genetic material in eukaryotic cells, whereas RNA (ribonucleic acid) is a single-stranded molecule involved in protein synthesis and other cellular processes. The stability and fidelity of genetic information are crucial for proper gene expression and cellular function.

**Why the Correct Answer is Right**
DNA is selected for genetic information compared to RNA due to its double-stranded structure, which provides greater stability and resistance to degradation. The double helix structure of DNA allows for base pairing between A-T and G-C, enabling precise replication and transmission of genetic information from one generation to the next. Additionally, DNA has a higher melting temperature than RNA, making it more resistant to denaturation and degradation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide a valid reason for DNA being selected for genetic information.
**Option B:** This option is incorrect because RNA is not as stable as DNA due to its single-stranded structure, making it less suitable for storing genetic information.
**Option C:** This option is incorrect because while DNA does have a higher melting temperature than RNA, this is not the primary reason for its selection as the genetic material.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the double-stranded structure of DNA provides a high degree of stability and fidelity, making it an ideal molecule for storing and transmitting genetic information.

**Correct Answer: B. RNA is not as stable as DNA due to its single-stranded structure, making it less suitable for storing genetic information.**