At the same income level, rural households have greater purchasing power than urban or suburban households, because part of the income used for food or living in urban or suburban households can be used by rural households for other consumption. Based on the above discussion, which of the following conclusions can best be derived? ['Rural households spend less on food and living than urban or suburban households.', 'Suburban households have higher purchasing power than urban households.', 'Generally speaking, there are more rural households than urban households.', 'All three types of households spend more on food than they spend on living.']