Task: Inferred Instance Class Reasoning (ontology: Sciences/Computer_Science)

After reasoning over the ontology, which class is one valid inferred class for the instance 'microgram per liter'? Context: A mass unit density which is equal to mass of an object in micrograms divided by the volume in liters.

A. application programming interface
B. measurement unit label
C. Interaction data
D. Usage clause

Answer: measurement unit label