A company has an Office 365 tenant. The company uses a third-party DNS provider that does not
allow TXT records.
You need to verify domain ownership.
What should you do?

A.
Create an MX record.

B.
Create a CNAME record.

C.
Create an A record.

D.
Create an SRV record.

Explanation:
Add a TXT or MX record for DNS verification.

Change nameservers to set up Office 365 with any domain registrar
https://support.office.com/en-us/article/Change-nameservers-to-set-up-Office-365-with-anydomain-registrar-a8b487a9-2a45-4581-9dc4-5d28a47010a2