Multiple choice technology Which method Retrieves the values of all the HTTP headers as a string getAllResponseHeaders() getResponseHeader(header) getResponseHeader(All) getAllHttpResponseHeaders() Reveal answer Fill a bubble to check yourself A Correct answer Explanation getAllResponseHeaders() is the correct XMLHttpRequest method that retrieves all HTTP response headers as a single string. getResponseHeader(header) gets a specific header. Options C and D are non-existent methods.