The Flynn effect is an example that shows a difference in IQ among?

A) ages.
B) genders.
C) cohorts.
D) cultures.

Flynn Effect

The observed rise over time in standardized intelligence test scores, thought to reflect changes in environmental factors.

Cohorts

Groups of subjects in a study who share a defining characteristic, typically born at around the same time, but can also refer to groups in experimental designs or demographic studies.