Which code creates a custom object?

A Digital Developer needs to store information temporarily and decides to create a custom object.

Which code creates a custom object?
A . CustomObject.createCustomObject(CustomObjectType,primaryKey);
B. CustomObject.createCustomObject(primaryKey,CustomObjectType);
C. CustomObjectMgr.createCustomObject(primaryKey);
D. CustomObjectMgr.createCustomObject(CustomObjectType,primaryKey)

Answer: A