HOTSPOT
A company deploys an Office 365 tenant.
You prepare to use the bulk add tool to add users to Office 365.
You need to prepare a file to use with the bulk add tool.
Which fields must you include in the file? To answer, drag the appropriate response to each field. Each
response may be used once, more than once, or not at all. You may need to drag the split bar between
panes or scroll to view content.
Answer: 
Only the UserName and DisplayName are required
Indeed. See: https://gallery.technet.microsoft.com/office/Bulk-import-the-user-568abc5f
UserName(required): The user ID That You used to log on to the Office365. For example: username@domain.
DisplayName(required): The display name of the user.
https://support.office.com/en-ie/article/Add-several-users-at-the-same-time-to-Office-365-Admin-Help-1f5767ed-e717-4f24-969c-6ea9d412ca88