You create a report in the Power BI service.
You plan to provide external users with access to the report by publishing the report to a public blog.
You need to ensure that the report in the blog post will be updated as the data is refreshed.
What should you do in the Power BI service?
To ensure that a Power BI report embedded in a blog post is updated as the data is refreshed, you should publish the report to the web and use the embed code URL in the blog post. This method allows the report to be easily accessible and ensures it reflects data updates. Other options do not provide the necessary embedding functionality or may not ensure regular updates to the report data.
After you create your Publish to web embed code and share it, the report is updated with any changes you make, and the embed code link is immediately active. Anyone who opens the link can view it. After this initial action, however, updates to reports or visuals can take approximately one hour before becoming visible to your users.
Not always data in web is update immediately, it might take up-to 1 hour to update.
Answer C. I have tested this and working well with my EMBED URL link.
Don't you need a license for that ?
For what? To publish and share embedded code, yes; to see the report on the blog, no. There is no mention about licensing here.