Final answer:
Nike.com is a national brand website that meets the criteria of having an effective Call To Action, strong use of user-generated images, and clear navigation.
Step-by-step explanation:
An example of a national brand website that meets the criteria stated is Nike.com. Nike's website has an effective Call To Action with clear and prominent buttons that encourage users to shop for their products. In terms of user-generated images, Nike has a section called 'Nike Community' where users can upload and share photos of themselves wearing Nike products. This creates a sense of authenticity and community on the website. Additionally, Nike's website has clear navigation with a well-organized menu and easy-to-find product categories.