Task: Property Constraint Reasoning (ontology: Sciences/Computer_Science)

The property 'directly negatively regulates activity of' applies to instances of 'material entity', and 'organism' is a subclass of 'material entity'. Which class can appear as the value of 'directly negatively regulates activity of' for instances of 'organism'?

A. licence
B. datum label
C. material entity
D. specimen collection process

Answer: material entity