The correct answer is A. Slidify allows embedded code chunks.
Slidify is a tool that allows you to create presentations from R markdown documents. It does this by converting the markdown document into a HTML presentation that can be viewed in a web browser. One of the features of Slidify is that it allows you to embed code chunks in your presentations. This means that you can include code in your presentations that can be executed by the viewer. This can be useful for demonstrating how to use R code or for showing the results of running R code.
B is incorrect because Slidify presentations can be shared easily. You can share a Slidify presentation by providing a link to the HTML presentation. The viewer can then view the presentation in a web browser.
C is incorrect because Slidify is not difficult to use. Slidify is a relatively easy tool to use. You can create a Slidify presentation by creating an R markdown document and then using the slidify function to convert the document into a HTML presentation.
D is incorrect because A is the correct answer.