Universal Container’s Salesforce Admin set the organization wide default for the account object to private and the role hierarchy is enabled. Later, another request came from the sales VP to open access to another role that is not on the role hierarchy tree division or branch? What would the Salesforce Admin do to extend the access?

Answer options:

A.Manual Sharing can be used to extend access to another role
B.Permission set can be created to extend access to another role
C.Field level security can be used to extend access to another role
D.Sharing rules can be used to extend access to another role

Correct Answer: D 
Sharing rules can be used to extend access to roles. Sharing rules can be used to extend access to roles, roles and subordinates, public groups or for a manager of a group or the subordinate group manager or sharing files can be used to provide access based on the record criteria. So, through sharing rules, you have two options to extend the access - there is the record owner or the record criteria. 
Option A is incorrect because manual sharing provides sharing for one user. 
Option B is incorrect because permission set cannot be assigned to a role. 
Option C is incorrect because field level security is used to restrict access to a field. 
Reference: 

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