(A) They help users and search engine crawlers navigate your site.
(B) They tell search engine crawlers which content should not be indexed.
(C) They pass link authority from one page to another.
(D) They allow your pages to appear in search engine results.
This question is from the HubSpot SEO Certification Exam. You can get all the answers to the questions asked in this exam on our HubSpot SEO Certification Exam Answers page.