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Free Iowa Assessments (ITBS) DiagnosticReading
Read the passage, then answer the question.
The Map That Was Wrong on Purpose
In 1930, a cartographer named Otto Lindberg finished a road map of New York State. Before he sent it to the printer, he added one thing that was not real: a tiny town called Agloe, placed at an empty crossroads in the Catskill Mountains. Lindberg was not careless. He was setting a trap. Making an accurate map takes years of surveying, and rival companies sometimes saved that effort by simply copying someone else's work. If Agloe ever appeared on a competitor's map, Lindberg would know the map had been stolen, because no honest surveyor could have found a town that did not exist.
Years later, Agloe did show up on a map made by a much larger company. Lindberg prepared to sue. But when investigators drove to the crossroads, they found a small general store. Its owner had seen the name Agloe on Lindberg's map and, assuming that was what the place was called, had named his business the Agloe General Store. The fake town had become a real one. The larger company argued that its map was accurate after all, and the case went nowhere.
Agloe faded once the store closed, but the idea survived. Mapmakers still hide invented streets and towns in their work. These "paper towns" are copyright traps, and they are almost never noticed by anyone but the people who planted them.
Why did Otto Lindberg add Agloe to his map?