The sentence to be placed is: "Having made citizens more and less knowledgeable than their predecessors, the Internet has proved to be both a blessing and a curse."
We must find the optimal insertion point for this sentence within the given paragraph. Let's examine each blank:
Analysis:
Decision:
The given sentence discusses the Internet's ambivalent impact, being both advantageous and detrimental. Inserting this sentence at Blank 4 is the most appropriate choice as it logically follows the concept of selecting information that merely confirms personal biases, thereby emphasizing the Internet's dual role in both educating and misinforming users.
Conclusion:
Consequently, the sentence should be placed at Blank 4.