My Solution to Build a Quiz Challenge w/ comments

// two-dimensional array holding questions + answer pairs inside of arrays
var questions = [
  ['Which language adds interactivity to a website?', 'javascript', 'js'],
  ['What allows for reusable blocks of code in JavaScript?', 'functions'],
  ['What is the JavaScript framework that is used server-side?', 'node.js', 'node']
];

/*
variables to hold the correct/incorrect questions
will be used to print question
*/
var correctQuestions = [],
    incorrectQuestions = [],

// variables to keep track of the number of right vs wrong
    correctAnswers = 0,
    incorrectAnswers = 0;

// function to write to the page
function print( message ) {
  document.write( message );
}

// function to print array of right/wrong questions
function printQuestions ( array ) {
  for ( var i = 0; i < array.length; i++ ) {
    print('<p>' + array[i] + '</p>');
  }
}

// loop through each question in the array
for ( var i = 0; i < questions.length; i++ ) {
  var currentQuestion = prompt( questions[i][0] );

  /*
  set returned string to lowercase for easier comparison.
  If right, increase correctAnswers and push question to
  correctQuestions array. Else, increase incorrectAnswers
  and push to incorrectQuestions array
  */
  currentQuestion = currentQuestion.toLowerCase();
  if ( currentQuestion === questions[i][1] || questions[i][2] ){
    correctAnswers++;
    correctQuestions.push( questions[i][0] );
  } else {
    incorrectAnswers++;
    incorrectQuestions.push( questions[i][0] );
  }
}

print('<h3 id="correct">Correct Questions: ' + correctAnswers + '</h3>');
sortQuestions(correctQuestions);
print('<h3 id="incorrect">Incorrect Questions: ' + incorrectAnswers + '</h3>');
sortQuestions(incorrectQuestions);