What I'm Learning Today: Olympics quiz with lots of conditional statements

Almost done with the Treehouse JavaScript Basics course. The project for conditional statements involves creating a quiz that keeps track of the user's inputs, and awards a crown based on how many questions they got right. I made my quiz about the Olympics because I love the Olympics.

// Ask at least five questions
// TODO: Deal with invalid user inputs
// Keep track of the number of questions the user answered correctly
var counter = 0;
var crown = '';

var gabbyDouglas = prompt("What gymnast won the gold medal in the women's all-around competition at the 2012 Olympic Games? \na) Aly Raisman \nb) Gabby Douglas \nc) Victoria Komova \n \nWrite your answer (a, b or c) in the box below.").toLowerCase();


var phelpsGold = prompt("How many gold medals did Michael Phelps win at the 2008 Olympic Games? \n \na) Six \nb) Seven \nc) Eight \nd) Nine \n \nWrite your answer (a, b, c or d) in the box below.").toLowerCase();


var magSeven = prompt("What was the nickname of the U.S. women's gymnastics team that brought home the gold at the Atlanta Games? \n \na) The Fab Five \nb) The Magnificent Seven \nc) The \'A\' Team \nd) The Three Musketeers \n \nWrite your answer (a, b, c or d) in the box below.").toLowerCase();


var coachDaly = prompt("Who was the head coach of the 1992 U.S. men's Olympic basketball team, known as \'The Dream Team?\' \n \na) Mike Krzyzewski (Coach K) \nb) Mike D'Antoni \nc) Chuck Daly \nd) Lenny Wilkens \n \nWrite your answer (a, b, c or d) in the box below.").toLowerCase();

if(coachDaly === 'c'){

var michaelPhelps = prompt("Which Olympian holds the record for most total medals, for either the Summer or Winter Games? \n \na) Michael Phelps \nb) Larisa Latynina \nc) Carl Lewis \nd) Mark Spitz \n \nWrite your answer (a, b, c or d) in the box below.").toLowerCase();


// Rank the player. 
// If the player answered all five correctly, give that player the gold crown: 
// 3-4 is a silver crown; 
// 1-2 correct answers is a bronze crown and 
// 0 correct is no crown at all.
  crown = "gold";
} else if(counter>2){
  crown = "silver";
} else if(counter>1){
  crown = "bronze";
} else {
  crown = "\'try again\'";

// Provide a final message after the quiz letting the user know the number of questions he or she got right.
alert("You got " + counter + " out of 5 answers correct! \nYou win the " + crown + " crown!");


And here is the HTML file: 

<!DOCTYPE html>
<html lang="en">
  <meta charset="utf-8">
  <link rel="stylesheet" href="css/main.css">
  <title>The Ultimate Quiz Challenge</title>
  <div class="container">
  <h1>The Ultimate Quiz Challenge</h1>
   <script src="quiz.js"></script>