Question: You're working on a site that uses an old version of jQuery, and you want to update to a newer version. What's the most efficient way to do so?

1. Install the newer version of jQuery, go through each script one by one, and fix what looks broken.
2. Read the change notes for the newer version of jQuery, fix all scripts, install the newer version, and fix anything that remains broken.
3. Install the newer version of jQuery as well as its Migrate plugin, fix all warnings, and uninstall the Migrate plugin.
4. Install the newer version of jQuery at the same time, and use `jQuery.noConflict()` on pages that need the older version.

Answer: The correct answer of the above question is Option C:Install the newer version of jQuery as well as its Migrate plugin, fix all warnings, and uninstall the Migrate plugin.