What permission must a manager have, to set the running user in a dashboard, to anyone below them in the role hierarchy?

Answer options:

A.View All Data
B.Modify All Data
C.View My Team’s Dashboards
D.View My Team’s Reports

Correct Answer: C 
Users with “View My Team`s Dashboards” can view the dashboard to view any user below them in the role hierarchy. 
A role hierarchy works together with sharing settings to determine the levels of access, the users have, to your Salesforce data. Users can access the data of all the users directly below them in the hierarchy. Users who need to see a lot of data (such as the CEO, executives, or other management) often appear near the top of the hierarchy. But the role hierarchies don`t have to match your org chart. Each role in the hierarchy just represents a level of data access that a user or group of user’s needs. 
Options A and B are incorrect because users with View All Data can edit the dashboard and view it as any user in their organization. The View All and Modify All permissions ignore sharing rules and settings, allowing administrators to grant access to records associated with a given object across the organization. View All and Modify All can be better alternatives to the View All Data and Modify All Data permissions. 
Option C is incorrect because this will allow the user to view the team reports only. 
Reference: 

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