Task: Property Constraint Reasoning (ontology: Earth_Environment/EnvironmentOntology)

The property 'preceded by' applies to instances of 'occurrent', and 'process' is a subclass of 'occurrent'. Which class can appear as the value of 'preceded by' for instances of 'process'?

A. obsolete environmental feature
B. obsolete grape beverage
C. emulsifier
D. occurrent

Answer: occurrent