Task: Property Constraint Reasoning (ontology: Arts_Media_Entertainment/CIDOC_CRM)

The property 'P21i was purpose of' applies to instances of 'E55 Type', and 'E58 Measurement Unit' is a subclass of 'E55 Type'. Which class can appear as the value of 'P21i was purpose of' for instances of 'E58 Measurement Unit'?

A. E63 Beginning of Existence
B. E8 Acquisition
C. E7 Activity
D. E11 Modification

Answer: E7 Activity