Final answer:
The probability of all pages advertising footwear depends on the specific marketing strategy and audience segmentation. Hence, ad will be the correct answer.
Step-by-step explanation:
To ensure that landing pages are the same across multiple ads, they can be set at the account level. This strategy enables a business to maintain consistency in their landing page experience for all advertisements run under that account. This consistency is integral for branding purposes and to prevent confusion among consumers.
Regarding the question about advertising footwear, if you have multiple pages or advertisements, it's not necessarily probable that all will advertise footwear on them unless each one is purposefully set up with that intent. Factors such as segmentation, targeting, and the relevance of specific products to different audiences will determine whether or not footwear is advertised on all of those pages.