Which of the following is an accurate description of the prevalence of college education in the United States? Select one: a. Among adults twenty-five years of age and older, roughly half are college graduates. b. Among adults twenty-five years of age and older, roughly one in four is a college graduate. c. Every U.S. state has at least twenty colleges or universities within its borders. d. Despite having a much higher rate of colleges and universities per capita than European countries; the U.S. has a lower rate of college graduation per capita. e. Although the U.S. has a lower number of colleges and universities per capita than Europe, it has a much higher rate of college graduation per capita.