Respuesta :
The only option that is a manufactured backlink technique that should be avoided is; D: social networking sites
What are backlinks?
Backlinks are also known as inbound links or incoming links or one way links. Now, these are links from one website to a page on another website.
From the above, Go ogle and other major search engines use backlinks as links for a specific page because pages that have a high number of backlinks always have high organic search engine rankings.
Looking at the options, the only one that should be avoided is social networking sites.
Read more about backlinks at; https://brainly.com/question/25760645
