You've been asked to test a non-transparent proxy lo make sure it is working.

You've been asked to test a non-transparent proxy lo make sure it is working. After confirming the browser is correctly pointed at the proxy, you try to browse a web site. The browser indicates it is "loading" but never displays any part the page. Checking the proxy, you see a valid request in the proxy from your browser. Checking the response to the proxy, you see the results displayed in the accompanying screenshot. Which of the following answers is the most likely reason the browser hasn't displayed the page yet?