31. Which statement best summarizes the author’s purpose in this article? (A) To present vertical farming as an emerging solution to global food security concerns while prioritizing its aesthetic integration into modern urban landscapes. (B) To analyze how vertical farming could revolutionize urban food systems while acknowledging the economic barriers that currently limit its widespread adoption. (C) To present a technical overview of vertical farming methodologies alongside a somewhat balanced assessment of their practical applications and limitations. (D) To examine how vertical farming addresses critical agricultural vulnerabilities while positioning it as the definitive solution to global food production challenges.