To determine which link is the safest among choices, the safest link is the one directly corresponding to the official domain of the organization or service. For example, in comparing links related to Microsoft, "microsoft.com" is the safest because it is the official domain. Other links that mimic or are similar but not official domains, such as "account-microsoft365.com," "microsoft365-secure.net," or "office365-mail.net," are less safe and could potentially be phishing attempts or malicious sites.

Therefore, if you have a set of links and one of them is the official domain name of the entity in question, that link is generally considered the safest to click.