**Core Concept**
Genetic reassortment is a process where two or more RNA or DNA viruses combine their genetic material to form new strains, leading to the creation of novel viral strains with unique combinations of viral genes. This process is a key factor in the emergence of new viral diseases.

**Why the Correct Answer is Right**
Genetic reassortment is characteristic of segmented RNA viruses, such as influenza viruses. When two influenza viruses infect the same cell, they can exchange genetic material through a process called reassortment, resulting in the creation of new viral strains. This process is facilitated by the segmented nature of the influenza virus genome, which allows for the mixing and matching of viral genes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because genetic reassortment is not typically associated with non-segmented RNA viruses, such as coronaviruses.
**Option B:** This option is incorrect because genetic reassortment is not a characteristic of DNA viruses, such as herpesviruses.
**Option C:** This option is incorrect because genetic reassortment is not typically associated with viruses that have a single-stranded DNA genome, such as parvoviruses.

**Clinical Pearl / High-Yield Fact**
The emergence of new influenza strains through genetic reassortment highlights the importance of ongoing surveillance and monitoring of viral strains to inform vaccine development and public health strategies.

**Correct Answer: C. Influenza.**