What Marketing Cloud Account Engagement feature of email now can be used to run these tests?

The marketing team likes to thoroughly test emails before sending them. This includes being able to view the links and variable tags as prospects will see them.

What Marketing Cloud Account Engagement feature of email now can be used to run these tests?
A . Create a test list of approved users to use in the testing tab of the email now.
B . Create a dynamic list of approved users to use as the recipient list in the sending tab.
C . Create a one off email test send by entering an email address in the Send to Emails section of the testing tab
D . Create a static list of approved users to use as the recipient list in the sending tab.

Answer: A