Final answer:
The correct unit of density from the given options is 'kilograms per cubic centimeter' as it aligns with the standardized units of mass per volume used for such measurements.
Step-by-step explanation:
The correct unit of density among the options provided is kilograms per cubic centimeter (d). The SI unit for density is kilograms per cubic meter (kg/m³), which is suitable for many substances but can be awkwardly large for everyday laboratory use. For practical applications, especially with solids and liquids, density is commonly expressed in grams per cubic centimeter (g/cm³), which is equivalent to grams per milliliter (g/mL) since 1 cm³ equals 1 mL. For gases, which are much less dense, we usually use grams per liter (g/L).