Which managed path should you use?

Contoso, Ltd., has an on-premises SharePoint 2013 implementation. It plans to migrate the sales
department to SharePoint Online. Additional departments will be migrated in the future.
The sales department currently has a dedicated site collection for collaboration and document
sharing.
The sales department site collection uses the managed path https://sales.contoso.com.
Contoso’s SharePoint Online environment is accessible by using the URL
https://contoso.sharepoint.com.
Sales team employees must be able to connect to SharePoint Online by using a simple managed
path.
You need to configure SharePoint Online.
Which managed path should you use?

A.
https://sales.contoso.com

B.
https://contoso-my.sharepoint.com

C.
https://contoso.sharepoint.com/sites/sales/

D.
https://teams.contoso.com/sites/sales/

Explanation:
Define managed paths in SharePoint Server 2013

An explicitly named path (for example, http://server/sites/team) is used for a single site collection.
In this case the managed path would be https://contoso.sharepoint.com/sites/sales/ as SharePoint
online uses https://contoso.sharepoint.com and we want to provide a managed path for the Sales
department’s site collection.