Which of the Following Is Most True Regarding Bulimia

Which of the following is most true regarding bulimia?

A) The prevalence is higher in Western nations than other parts of the world, and the number of cases increased during the later part of the 20th century.
B) The prevalence is lower in Western nations than other parts of the world, and the number of cases increased during the later part of the 20th century.
C) The prevalence is higher in Western nations than other parts of the world, and the number of cases decreased during the later part of the 20th century.
D) The prevalence is higher in developing nations than other parts of the world, and the number of cases increased during the later part of the 20th century.