Airport administrator: According to the latest figures, less than 1 commercial flight in 2 million strays off course while landing, a number low enough to allow runways to be built closer together without a significant increase in risk. Opponents of closer runways claim that the number is closer to 1 in 20, 000, but this figure is based on a partial review of air traffic control tapes and so is relatively unreliable compared to the other figure, which is based on a thorough study of the flight reports required of pilots for all commercial flights. Which one of the following most accurately describes a flaw in the airport administrator's argument? ['The argument questions the integrity of those who are opposed to allowing runways to be built closer together.', 'The argument presumes, without providing justification, that the air traffic control tapes studied do not provide accurate information concerning specific flights.', 'The argument overlooks the fact that those who make mistakes are often unreliable sources of information about those mistakes.', 'The argument presumes, without providing justification, that building runways closer together will encourage pilots to be more cautious while landing.']