The following figures relate to the next question. Age-Adjusted INCIDENCE RATES per 100,000, 1935-1967 Age-Adjusted MORTALITY RATES State of Connecticut per 100,000, 1935-1967 State of Connecticut 35 Stomach $ 50 25 20 Cases per 100,000 population 15 15 Colon Deaths per 100,000 pope 1930 1940 1950 1960 1970 1930 1940 1950 1940 1970 The most likely explanation for the relatively flat age adjusted Mortality rates from colon cancer is: O Changing age composition of the population between 1935-1968 Decreasing prevalence of colon cancer cases Decreasing incidence of colon cancer cases O Decreasing colon cancer case fatality % Increasing incidence of colon cancer cases