Where would this action be added in order to add the prospect to the specific list?

A marketing user wants prospects to be added to a list when they click on a link in a list email.

Where would this action be added in order to add the prospect to the specific list?
A . On the ‘Sending’ tab of the email template
B . On the Testing’ tab of the email template
C . On the Testing’ tab of the list email
D . On the ‘Sending’ tab of the 1st email

Answer: D