What is a backlink? There are 2 correct answers to this question.

What is a backlink? There are 2 correct answers to this question.
A . A piece of HTML code used for the web service tracking
B . A link from the customer’s corporate career site to the Recruiting Marketing career site.
C . A piece of HTML code that is portable and can be easily placed on an online source.
D . A link from one online source to another online source

Answer: B,D