9. What are the differences between search engine optimization (SEO) and pay-per-click (PPC)?
(A) PPC is organic. It is a form of advertising that drives traffic. SEOguarantees that the ads appeared at the top of the page, above the listingsinfluenced by PP( C  )
(B) SEO refers to the search results of a search engine that can be influenced by paidadvertising. PPC results are ranked according to the advertising fee.
(C) PPC is a form of advertising that drives traffic. Paid ads appear atthe top of the page, above the organic listings influenced by SEO.
(D) Organic search refers to the search results of a search engine that cannot beinfluenced by paid advertising. SEO results are ranked according tothe advertising fee.