which of the following is correct way to manage a redirect request..., JQuery, Web Development

Question:Which of the following is the correct way to manage a redirect request after a jQuery Ajax call?

A $.ajax({ 
type: "POST", 
url: reqUrl, 
data: reqBody, 
dataType: "json", 
success: function(data, textStatus) { 
 if (data.redirect) { // data.redirect contains the string URL to redirect to   window.location.href = data.redirect; 
 } else { // data.form contains the HTML for the replacement form $("#myform").replaceWith(data.form);
 }
 } 
}); 
B public ActionResult Index(){
 if (!HttpContext.User.Identity.IsAuthenticated) { HttpContext.Response.AddHeader("REQUIRES_AUTH","1");
 } 
return View() } 
C $.ajax( error: function (jqXHR, timeout, message) { 
var contentType = jqXHR.getResponseHeader("Content-Type");
if (jqXHR.status === 200 && contentType.toLowerCase().indexOf("text/html") >= 0) {  window.location.reload(); 
} 
}); 
D $(document).ready(function () {
 $(document).ajaxSend( function(event,request,settings) {
 var intercepted_success = settings.success; 
settings.success = function( a, b, c ) { 
if( request.responseText.indexOf( "<html>" ) > -1 )
 window.location = window.location; else intercepted_success( a, b, c ); 
}; 
});
 });

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Question:Which of the following is the correct way to manage a redirect request after a jQuery Ajax call?

B public ActionResult Index(){ if (!HttpContext.User.Identity.IsAuthenticated) { HttpContext.Response.AddHeader("REQUIRES_AUTH","1"); } return View() }

C $.ajax( error: function (jqXHR, timeout, message) { var contentType = jqXHR.getResponseHeader("Content-Type"); if (jqXHR.status === 200 && contentType.toLowerCase().indexOf("text/html") >= 0) { window.location.reload(); } });

A