It seems everything is connected, but the drop-down menu does not want to fall out, does not respond to a click, only when you press the down arrow, does it fall, what is the error?
<div class="navbar navbar-default navbar-static-top"> <!-- зафиксировали сверху !--> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#responsive-menu"> <span class="sr-only">Открыть навигацию</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">Логотип</a> </div> <div class="collapse navbar-collapse" id="responsive-menu"> <ul class="nav navbar-nav"> <li><a href="#">Пункт 1</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown"> Пункт 2 <b class="caret"></b> </a> <ul class="dropdown-menu"> <li><a href="#">Выбор 1</a></li> <li><a href="#">Выбор 2</a></li> <li><a href="#">Выбор 3</a></li> <li><a href="#">Выбор 4</a></li> </ul> </li> <li><a href="#">Пункт 3</a></li> <li><a href="#">Пункт 4</a></li> </ul> </div> </div> </div> <div class="container"> <div class="row"> <h1>Название страницы</h1> </div> </div> <div class="container-fluid"> <div class="row"> <div class="col-md-6"></div> <!-- в любом ряду 12 колонок !--> <div class="row"> <div class="col-md-4"></div> <div class="col-md-4"></div> <div class="col-md-4"></div> </div> <div class="col-md-4 hidden-md visible-lg"></div> </div> </div> <link href=" https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css " rel="stylesheet "/> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js "></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js "></script> <!-- jQuery (necessary for Bootstrap's JavaScript plugins) --> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js "></script> <!-- Include all compiled plugins (below), or include individual files as needed --> <script src="js/bootstrap.js "></script> 
