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

The property 'regulated by' applies to instances of 'process', and 'plant structure development stage' is a subclass of 'process'. Which class can appear as the value of 'regulated by' for instances of 'plant structure development stage'?

A. process
B. obsolete anthropogenic habitat
C. obsolete chicken meat product
D. decreased quality

Answer: process