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

The property 'causal relation between material entity and a process' applies to instances of 'material entity', and 'manufactured product' is a subclass of 'material entity'. Which class can appear as the value of 'causal relation between material entity and a process' for instances of 'manufactured product'?

A. advective
B. process
C. tracer
D. occurrent

Answer: process