What should be done to provide managers access to records of which they are not the owner in a private sharing model?

What should be done to provide managers access to records of which they are not the owner in a private sharing model?
A . Create a Manager Permission set and select the “View All Data” option
B . Create a Manager profile and select the “View My Teams Data” option.
C . Define a Role Hierarchy and use the Grant Access Using Hierarchies option
D . Set the Manger field for each User Record on the Manager’s team.

Answer: A