Which of the following is required for the role hierarchy to work? (Choose two options)

Answer options:

A.The object should have the grant access using hierarchies enabled in the organization wide default
B.The record should be owned by a user that have a subordinate role
C.The object should have the grant access using hierarchies disabled in the organization wide default
D.The record should not be owned by a user that have a subordinate role

Correct Answer: A and B 
For the role hierarchy to work, the object should have the grant access using hierarchies enabled in the organization wide default and the record should be owned by a user that have a subordinate role. 
Option C is incorrect. If the grant access using hierarchies is disabled then the role hierarchy cannot be used, and it will not be considered. 
Option D is incorrect because the role hierarchy opens up access and the higher role will be able to access his team records, so the record should be owned by a user who has a subordinate role. 
Reference: 

https://help.salesforce.com/articleView?id=admin_roles.htm&type=5