In His Book, the Filter Bubble, Online Political Activist Eli

In his book, The Filter Bubble, online political activist Eli Pariser contends that when a search engine filters searches, it encloses people in a kind of "invisible bubble" or "walled garden" that ________.

A) limits what they see to what they are already familiar with
B) exposes them to new, exciting information that knows no boundaries
C) enables them to discover ideas that are outside their comfort zone
D) ensures that they are connected to other people all the time