HTTP status codes in the 2xx range indicate that a request has been received, understood, and processed successfully. A . 2xx - Correct. This range of status codes indicates successful responses. B. 3xx - Incorrect. This range of status codes indicates redirection messages. C. 4xx - Incorrect. This range of status codes indicates client errors. D. 5xx - Incorrect. This range of status codes indicates server errors. Reference: HTTP Status Codes