The correct option is
C Names of genera and species
Binomial nomenclature is the formal naming system for living things that all scientists use. It gives every species a two-part scientific name. For example, a ladybug found in the United States goes by the fancy name of
Harmonia axyridis. The first part of a scientific name, like
Harmonia, is called the genus. A genus is typically the name for a small group of closely related organisms. The second part of a scientific name,
axyridis in this example, is the specific epithet. It is used to identify a particular species as separate from others belonging to the same genus. Together, the genus plus the specific epithet is the full scientific name for an organism.
Therefore, the correct answer is option B.