The correct answer is D. All of the mentioned.
Slidify is a tool that allows you to create interactive presentations using HTML, CSS, and JavaScript. It was created by Ramnath Vaidyanathan and is available as a free and open-source project on GitHub.
Slidify presentations are just HTML files, which means that they can be viewed in any web browser. They can also be embedded in other websites or shared on social media.
Slidify is a very customizable tool. You can change the look and feel of your presentations, add interactive elements, and even create your own slide templates.
However, there are some limitations to Slidify. For example, it does not support audio or video playback. Additionally, it can be difficult to create complex presentations with Slidify.
Overall, Slidify is a powerful tool for creating interactive presentations. However, it is important to be aware of its limitations before using it.