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

The property 'uses software' applies to instances of 'software', and 'PostgreSQL' is a subclass of 'software'. Which class can appear as the value of 'uses software' for instances of 'PostgreSQL'?

A. histologic grade according to AJCC 7th edition
B. volume unit
C. software
D. web page specification

Answer: software