Bob Owns Twenty Acres of Land on the Side of a Mountain

Multiple Choice

Bob owns twenty acres of land on the side of a mountain in Colorado. He files a suit against the Durango Flight School, claiming that its planes flying over his land violate his property rights. To succeed, his best argument is

A) the planes fly over more than twice a day.
B) there are other routes the planes could take.
C) the flights are low and frequent, interfering with enjoyment of his land.
D) the planes are effectively taking private property for private use.