How can you duplicate an object in Illustrator?

Duplicating an object in Adobe Illustrator can indeed be accomplished using the keyboard shortcuts, specifically by using Ctrl + C to copy the object followed by Ctrl + V to paste it. This method is widely used for duplicating not only in Illustrator but across many applications, allowing for quick and efficient creation of copies of objects or elements.

While the other methods mentioned can serve similar purposes, they are either incorrect or not standard procedures in the context of Illustrator. For instance, right-clicking does not provide a direct 'duplicate' option; instead, it offers several other commands, with 'Copy' and 'Paste' being the appropriate choices for duplication. The choice of navigating through 'Object > Duplicate' also does not exist in Illustrator, as this is not an available menu command. Lastly, the combination of Ctrl + D is typically used for repeating the last transformation applied to an object rather than directly duplicating an object. This makes the method of Ctrl + C followed by Ctrl + V the most straightforward and widely applicable technique for duplication.