Given the code below, select the option that best explains the purpose of the $x$ variable:

Socket socket $=$ new Socket$($protocol $+"/"+$ host,$80)$;

BufferedReader $x=$ new BufferedReader$($new

InputStreamReader$($socket$.$getinputStream$()))$;

Monitor the socket and shut down when it disconnects

Receive input from the socket

Fulfill HTTP requests

Transmit output across the socket