According to the system of binomial nomenclature, a properly written scientific name consists of two parts: the genus name (capitalized) and the species name (lowercase).
Out of the options provided:
A. Acer rubrum
C. Acer rubrum
Both of these options are properly written scientific names because:
1. "Acer" represents the genus name, which should be capitalized.
2. "rubrum" represents the species name, which should be in lowercase.
Therefore, both options A and C (Acer rubrum) are correct scientific names based on the rules of binomial nomenclature.
