Explanation: The best place for the team to explore Lightning component code, documentation, and specifications is the Components Library on developer.salesforce.com1. The Components Library is the Lightning components developer reference, where the team can find code samples, SDKs, tools, metadata coverage information, and a developer guide for Lightning Web Components1. The team can also use the live code environment to code their first Lightning web component and see the results in real time2. Salesforce Extensions for VS Code (A) is a powerful tool for developing Lightning components, but it is not a source of code, documentation, and specifications. Design Tokens on SLDS website (B) are a way to store and maintain consistent design attributes across different platforms, but they are not specific to Lightning Web Components.