Regarding IQ and Age, Which of the Following Statements Is

Multiple Choice

Regarding IQ and age, which of the following statements is FALSE?

A) After middle childhood, IQ scores, on average, usually change very little from year to year with a small, gradual increase until about age 40 and a small slow decline thereafter.
B) Those individuals who gain in IQ were exposed to intellectual stimulation during early adulthood.
C) Those adults who decline in IQ typically suffer from chronic illnesses, drug or alcohol abuse, or unstimulating lifestyles.
D) Intellectual skills involved in crystallized intelligence slowly decline after middle age with fluid intelligence actually increasing or, at least, declining very little until advanced age.