DRAG DROP
You implement Office 365 for an organization.
You must create the correct DNS entries needed to configure Office 365.
Which DNS entries should you create? To answer, drag the appropriate DNS record type to the correct
purpose. Each DNS record type 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: 
Autodiscover should be SRV record
CNAME is right
Correct;
TXT will be an SPF (Sender Policy Framework) record http://www.openspf.org/
MX is a Mail eXchange record https://en.wikipedia.org/wiki/MX_record
CNAME is used for Outlook autodiscover https://support.office.com/en-us/article/Create-DNS-records-for-Office-365-using-Windows-based-DNS-9eec911d-5773-422c-9593-40e1147ffbde?ui=en-US&rs=en-US&ad=US
Marty is correct.
Confirmed from my o365 console
Office 365 is using below TXT record to prevent outbound email being flagged as spam
TXT – @ v=spf1 include:spf.protection.outlook.com -all 1 Hour