Which of the following is not a best practice when using JavaScript libraries?
Developers should ensure the library functions they use are cross-browser compatible for the version of HTML they are using.
Developers should link to the library file and to each plug in script in the <head> section of the HTML document using the <script> tag.
Developers should use plugins from a variety of JavaScript libraries to ensure compatibility.
Developers should become familiar with one library then optimize HTML code with that specific library in mind.
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