I am completely lost on this one. I don't understand what the instructions are asking me to do.
It's easy, even instructions tell you how to do it exactly. Before this line of code:
<link rel="stylesheet" href="main.css">
add this line of code:
<link rel="stylesheet" src="http://s3.amazonaws.com/codecademy-content/courses/ltp/css/bootstrap.css">
I would not have known how to do that.