A Marketing Cloud Account Engagement administrator would like to provide access to their eBook once...

 Two methods that would accomplish providing access to an eBook once a form has been submitted are using a form completion action to send an autoresponder email with the eBook, and re-directing the prospect to the eBook instead of showing the form’s Thank You Content. A form completion action is a way of defining what happens after a prospect submits a form, such as sending an email, adding to a list, or adjusting a score. An autoresponder email is a type of email that is automatically sent to a prospect when they perform a specific action, such as submitting a form. A Thank You Content is a web page that is displayed after a prospect submits a form, such as a confirmation message or a link to a resource. Using a form completion action to initiate an auto-download of the eBook, or including a link to the eBook in the Below Form section of the form are not methods that would accomplish providing access to an eBook once a form has been submitted, as they either involve downloading the eBook before submitting the form, or displaying the link to the eBook before submitting the form4. References: 4: [Create a Form]