Final answer:
In a trigger campaign, a marketer can send an email alert to lead owners, account owners, and opportunities, but not to a lead or program token.
Step-by-step explanation:
In a trigger campaign, a marketer can send an email alert to various recipients, such as lead owners, account owners, and opportunities. However, a lead or program token cannot be sent as an alert email. Lead and program tokens are placeholders used to personalize the email content with dynamic information, such as the recipient's name or program details. They are not actual recipients of the email.