Final answer:
To differentiate the links, Northern Trail Outfitters (NTO) should add the class attribute to the a tags in the HTML code of the email.
Step-by-step explanation:
To differentiate the links, Northern Trail Outfitters (NTO) should add the class attribute to the a tags in the HTML code of the email. The class attribute can be used to give each type of link a different name or identifier. For example, if NTO wants to differentiate between image links, text links, and regular links, they could add the following classes:
- <a href="url">Image Link</a>
- <a href="url">Text Link</a>
- <a href="url">Regular Link</a>