250 words or more

After reading the article "How Political Opinions Change" by Pärnamets and Van Bavel, respond to the following in 250 words or more:

1. What is "choice blindness" and how do the article's authors explain its significance to political opinions? 

2. Take the ideas presented in the article into account. In an era of political polarization in the "new media environment" do you see polarization increasing, decreasing, something else? Explain.