HOTSPOT
You manage an Office 365 tenant for Contoso, Ltd.
Guest links for the SharePoint Online tenant are disabled.
You need to enable guest links for the contoso-my.sharepoint.com site collection.
In the SharePoint admin center, in which two locations can you enable guest links? To answer, select the appropriate links in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
level. The tenant-level settings determine what options are available at the site collection level.
Answer: 
Explanation:
External sharing is controlled at both global settings that affect all of SharePoint Online and the site collection
References: https://support.office.com/en-us/article/Turn-external-sharing-on-or-off-for-SharePoint-Online-
6288296a-b6b7-4ea4-b4ed-c297bf833e30
This question is out of date, now “sharing” moved from “Settings” to separate menu (between Settings and Apps as you can see on the screenshot)