Which Is a Real-Life Example of a Secular Trend

Multiple Choice

Which is a real-life example of a secular trend?

A) The average height of Western European and American children increased by nearly four inches between 1880 and 1950.
B) Children in Japan were taller in 1967 than they were in 1966.
C) Somalian parents tended to have more female babies in 1994 than they did in 1992.
D) The average weight of a man in Laos increased two pounds from 1993 to 1997.