What caused this issue?

Cloud Kicks has recently rolled out a new Experience Cloud site for its customers. The site has been activated and the contacts have been enabled as customer users. However, none of the users received their login credentials in an email.

What caused this issue?
A . The sender’s email address was changed while it was pending verification.
B. The welcome emails were not enabled for the site.
C. The sender’s email address was changed and not verified.
D. The roles were not enabled for the users.

Answer: B