Explanation:

JavaScript can be written in multiple ways:

Directly into a .js file and included into an HTML page

• Example:

Directly on the server page

• JavaScript can be used in server-side environments like Node.js.

Directly into HTML pages using the <script> tag

• Example:

Thus, JavaScript supports all these methods, making (D) all of the mentioned the correct answer.

<script>

    alert("Hello, JavaScript!");

</script>

<script src="script.js"></script>