"Out with the old, in with the new" has resulted in people no longer appreciating the history and artistic integrity of our country's oldest buildings and failing to realize that once "the new" is brought in, "the old" is lost to us forever.
Explanation:
The above is the correct text in the passage that best refines the author's claim about protecting historically significant architecture.
This is true because in the above text, he reveals what has made people to no longer appreciate history and artistic integrity. Then he points out the danger that awaits when "the new" is brought in. Then, "the old" will actually be lost.
