What kinds of model is CIDOC-CRM? (CIDOC-CRM是哪种模型？)

A、
CIDOC-CRM is a conceptual model
（CIDOC-CRM是概念模型）;
B、CIDOC-CRM is an object-oriented model （CIDOC-CRM是面向对象模型）;
C、 CIDOC-CRM is an entity-relationship model （CIDOC-CRM是实体-关系模型）;
D、
CIDOC-CRM is an event-centric model （CIDOC-CRM是事件为中心的模型）