A 401 error indicates unauthorized access. To fix this, the script needs to include the appropriate authorization token in the request headers. Authorization Header: The Authorization header with a Bearer token is commonly used for OAuth 2.0 authorization. Bearer Token: This token is used to authenticate API requests securely. Option A is correct as adding the Authorization header with the Bearer token is the proper way to authenticate the request and resolve the 401 error. Reference: Webex API Documentation: Authorization and Authentication