Ng-click="start() not working

hi

I have created a simple quiz and for some reason it will not load to start the quiz

it comes up with this error in the console angular.js:30269WARNING: Tried to load angular more than once.

Here is the code :

quiz. js

var app = angular.module(‘quizApp’, []);

app.directive(‘quiz’, function(quizFactory) {
return {
restrict: ‘AE’,
scope: {},
templateUrl: ‘quiz.html’,
link: function(scope, elem, attrs) {
scope.start = function() {
scope.id = 0;
scope.quizOver = false;
scope.inProgress = true;
scope.getQuestion();
$compile($(element))(scope);
};

		scope.reset = function() {
			scope.inProgress = false;
			scope.score = 0;
		}

		scope.getQuestion = function() {
			var q = quizFactory.getQuestion(scope.id);
			if(q) {
				scope.question = q.question;
				scope.options = q.options;
				scope.answer = q.answer;
				scope.answerMode = true;
			} else {
				scope.quizOver = true;
			}
		};

		scope.checkAnswer = function() {
			if(!$('input[name=answer]:checked').length) return;

			var ans = $('input[name=answer]:checked').val();

			if(ans == scope.options[scope.answer]) {
				scope.score++;
				scope.correctAns = true;
			} else {
				scope.correctAns = false;
			}

			scope.answerMode = false;
		};

		scope.nextQuestion = function() {
			scope.id++;
			scope.getQuestion();
		}

		scope.reset();
	}
}

});

app.factory(‘quizFactory’, function() {
var questions = [
{
question: “A doctor who can typically diagnose food allergies is called an allergist?”,
options: [“True”, “False”],
answer: 0
},
{
question: “Anaphylaxis should be treated with an antihistamine pill (e.g. Benadryl)?”,
options: [“True”, “False”],
answer: 1
},
{
question: “What’s the best place for an allergic person to keep their auto-injector (e.g. EpiPen)?”,
options: [“With them at all times”, “In their car”, “in their locker”],
answer: 0
},

    {
		question: "If someone is having anaphylactic reaction, what is the correct emergency procedure to follow?",
		options: ["Give epi pen, call 999, use the second dose of epi pen if needed, go to the hospital", "Use epi pen, drive to hospital", "Take an anti-histamine e.g. Benadryl, call 999, use epi pen, go to the hospital"],
		answer: 0
	},
	{
		question: "Epiephrine auto-injectors i.e. EpiPen are not reusable and expire within approximately one year?",
		options: ["True", "False"],
		answer: 0
	},
	{	
		question: "Anaphylaxis is caused by what system in the body?",
		options: ["The immune system", "The respiratory system", "The digestive system"],
		answer: 0
	}
];

return {
	getQuestion: function(id) {
		if(id < questions.length) {
			return questions[id];
		} else {
			return false;
		}
	}
};

});

quiz. html file
http://codepen.io/anon/pen/wMYLBG

index.html

                 <!-- Quiz Js -->
               <script src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
             <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.0/angular.min.js"></script>
                <script src="js/quiz.js"></script

please can you tell me where I am going wrong with this

thanks