(A) When there are multiple schema markups that you want to implement on a single page
(B) When you are unable to use a plugin to add structured data to your website
(C) You should always work with a developer to implement structured data.
(D) When there are a large number of required or recommended properties in a markup
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.