Feedback on the Conditional Challenge.

alert('This is the history trivia quiz. Guess the answers to 5 questions and you will get a ranking. Good Luck!');

var score = 0;

var first_question = prompt("What year did the Titanic sink?");
  if ( parseInt(first_question) === 1912 ) {
      score += 1;
  }

var second_question = prompt("In what year did World War II begin?");
  if ( parseInt(second_question) === 1939 ) {
      score += 1;
  } 

var third_question = prompt("Which U.S president signed the Federal Reserve Act?");
  if ( third_question.toUpperCase() === 'WOODROW WILSON' || third_question.toUpperCase() === 'WILSON' ) {
      score += 1;
  }

var fourth_question = prompt("Who created the first steam engine?");
  if ( fourth_question.toUpperCase() === 'JAMES WATT' ) {
      score += 1;
  }

var fifth_question = prompt("Who created the largest empire in human history?");
  if ( fifth_question.toUpperCase() === 'GENGHIS KHAN' ) {
      score += 1;
  } 

alert('You got ' + score + ' out of 5 correct.' + ' Press OK to see your ranking.');

if ( score == 5 ) {
    document.write('<p> You get a ranking of a Gold Crown! This places you in the highest ranking of all quiz takers! Good job!</p>');
} else if ( score == 3 || score == 4 ) {
    document.write('<p> You get a ranking of a Silver Crown! This places you in the second highest ranking of all quiz takers! Nice effort!</p>');
} else if ( score == 2 || score == 1 ) {
    document.write('<p> You get a ranking of a Bronze Crown! This places you in the third ranking of all quiz takers! You have a decent knowledge of history.</p>');
} else {
    document.write('<p> You get no ranking and no crown. You got every question wrong. Time to brush up on your history knowledge.</p>');
}