At least in Western, industrialized nations, the age of the onset of puberty has decreased 3-4 years in the last century. This probably reflects:
A) improved medical care and living conditions.
B) changes in the genetic makeup of people.
C) poor diets that are high in junk foods.
D) the emphasis on strenuous daily exercise and sports.

Question

Quizplus · Accepted Answer

The decrease in the age of the onset of puberty in Western, industrialized nations over the last century is most likely due to improved medical care and living conditions. Better healthcare, nutrition, and overall living standards can lead to earlier puberty. Changes in genetic makeup, diets high in junk foods, and emphasis on exercise are less directly related to this trend.

At Least in Western, Industrialized Nations, the Age of the Onset