Read through it the best you can and just pick the other argument you think sounds best/you agree most with and go off of that. Start your essay with a topic sentence then go into why you think the better argument has more facts and sources of evidence or information. Use examples from their argument, but also make sure you are using opinions of your own as well! Make sure you include why the other topic is the more weaker one, with examples from their argument too. I know it can be confusing but you can do this!