var questions = [{
question: "What's the currency of the USA?",
choices: ["US dollar","Cats", "Ruble", "Horse", "Gold"],
corAnswer: 0,
}, {
question: "Where was the American Declaration of Independence signed?",
choices: ["Philadelphia","California", "At the bottom", "Frankie pub", "China"],
corAnswer: 0,
}];

function looper(arr) {
for (var i = 0; i < arr.length; i++) {
questions[i].userAnswer = null;
}
}

looper(questions);

I used the code above....which should be correct, yet your test considers it wrong....why?