Question: Which choice best describes the following usage of the HttpClient.get method in the getsettings class method?

1. The RxJs pipe method is an alias for the subscribe method, so a call to `getSettings` will execute the get query. The retry operator is used to tell the pipe call to retry the get query three times.
2. It will produce an error at runtime because the pipe method is not available off of the `Httpclient.get` call.
3. Every single call to the getSettings method will result in the Httpclient making three total get requests to the settingsUrl, which is not ideal because there will always be two extra calls that are not needed. The retry operator should not be used in thi
4. When the result of the getSettings method is subscribed to, the HTTP GET call will be made; if it fails, it will be retried up to three times before it gives up and returns an error.

Answer: The correct answer of the above question is Option D:When the result of the getSettings method is subscribed to, the HTTP GET call will be made; if it fails, it will be retried up to three times before it gives up and returns an error.