To include an external JavaScript library in a Lightning Web Component (LWC), developers must follow a specific security and loading protocol dictated by the Lightning Locker or LWC Security. Standard HTML <script> tags (Option D) are not permitted in LWC templates for security reasons.

The correct process involves three steps:

Import the method from the platformResourceLoader (Option C): The developer must import the loadScript (for JS) or loadStyle (for CSS) function from the lightning/platformResourceLoader module.

Import the static resource (Option B): The developer must import the URL of the static resource using the @salesforce/resourceUrl/resourceName syntax.

Call loadScript (Option A): Inside a lifecycle hook (typically renderedCallback), the developer calls loadScript(this, this.myResourceUrl). This function returns a Promise, allowing the developer to perform initialization logic once the library is fully loaded and ready for use.

Option E is incorrect because LWC handles the loading and execution within the framework's security context; manually appending elements to the DOM is not the standard or safe way to load resources. This three-step process ensures that the external code is loaded asynchronously and safely within the component's namespace.

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