Rather than allowing developers to tear down old buildings simply to put up new ones, local governments
could enact ordinances to preserve their area's architecture.

Why is this sentence important to the passage as a whole?

A. It summarizes the writer's attitude toward government involvement in architecture.

B. It concludes the writer's discussion of modern architecture.

C. It begins to introduce solutions to the problems the writer raises.

D. It begins to describe the problems the writer wants to highlight.