According to the U. S. Census report, after deducting inflation, middle-income household income increased by 1.6% in 1983 compared to 1982. Normally, as household income rises, the number of poor will decrease. However, the national poverty rate in 1983 was 18 years The Census Division provided two possible reasons: the deep, long-lasting effects of the 1981-1982 recession; the number of households supported by women and the number of adults not living with relatives Increase, and both are poorer than the entire population. Which of the following conclusions can be drawn from this report? ['the national poverty rate has been steadily increasing for 18 years.', 'if the early economic recession still brings continuous effects, the national poverty rate will rise.', 'even if some households in the population have fallen or have not increased their income, the median household income may still increase.', 'Middle-income income is more affected by changes in family patterns than by the degree of expansion or decline of the national economy.']