A Secular Trend in Pubertal Development Refers to the

A secular trend in pubertal development refers to the

A) difference between boys and girls as to when they enter puberty.
B) changes in physical maturation over age that adolescents experience.
C) nongenetic changes in onset that occur over extended time across history.
D) genetic changes that occur and influence the growth spurt and pubertal changes.
E) consistencies in the age of pubertal onset across generations and countries.