Looking for feedback RE: printing results to the page

//Create a 2D array with questions and answers
var harryPotterQuiz = [
    ["What was the name of Harry's owl?", "hedwig"],
    ["What was the name of Hagrid's dog?", "fang"],
    ["What was the name of Hagrid's pet spider?", "aragog"],
    ["What's the name of the Killing Curse?", "avada kedavra"],
    ["What is Professor Dumbledore's first name?", "albus"],
    ["What magical plant gives Harry gills during the Triwizard Tournament?", "gillyweed"]
];

//Create a function that prints a message to the screen
function print(message) {
    document.write("<p>" + message + "</p>");
}

//Create a function that prints a message with number of correct guesses
function printScore() {
    var scoreHTML = "<h3>" + "Congrats! You answered ";
    scoreHTML += guessCorrect.length + " out of ";
    scoreHTML += (guessCorrect.length + guessIncorrect.length) + " questions correctly!";
    scoreHTML += "</h3>";
    print(scoreHTML);
}

//Create a function that prints a list of correctly answered and incorrectly answered questions
function printFinished(answerList) {
    var listHTML = "<ul>";
    for (var counter = 0; counter < answerList.length; counter += 1) {
        listHTML += "<li>" + answerList[counter] + "</li>";
    }
    listHTML += "</ul>";
    print(listHTML);
}

//Create two arrays that store the incorrectly/correctly answered questions
var guessCorrect = [];
var guessIncorrect = [];

//Create a function that prompts the user to answer the questions
function startQuiz(quizList) {
    for (var i = 0; i < quizList.length; i += 1) {
        var question = prompt(quizList[i][0]);
        question = question.toLowerCase();
        if (question == quizList[i][1]) {
            guessCorrect.push(quizList[i][0]);
        } else {
            guessIncorrect.push(quizList[i][0]);
        }
    }
}

//Start the quiz
startQuiz(harryPotterQuiz);

//Print the score
printScore();

//Print the correct/incorrect questions - if no questions are answered correctly or incorrectly, the text is not displayed
if (guessCorrect.length > 0) {
    print("You answered these questions correctly:");
    printFinished(guessCorrect);
}

if (guessIncorrect.length > 0) {
    print("You answered these questions incorrectly:");
    printFinished(guessIncorrect);
}