Current maps showing the North American regions where different types of garden plants will flourish are based on weather data gathered 60 years ago from a few hundred primitive weather stations. New maps are now being compiled using computerized data from several thousand modern weather stations and input from home gardeners across North America. These maps will be far more useful. Each of the following, if true, helps to support the claim that the new maps will be more useful EXCEPT: ['Home gardeners can provide information on plant flourishing not available from weather stations.', 'Weather patterns have changed in the past 60 years.', 'Weather conditions are the most important factor in determining where plants will grow.', 'Some of the weather stations currently in use are more than 60 years old.']