During middle childhood, the long-term knowledge base grows larger and becomes organized into

It is generally the case that most great scientists have their ground-breaking ideas when they are in early to middle adulthood, but rarely when they are older. What might explain this fact?

A) The brain shrinks with age. B) General intelligence declines steeply after middle adulthood. C) Fluid intelligence peaks in middle adulthood, and then declines in later life. D) Crystallized intelligence peaks in middle adulthood, and then declines in later life.

The field of _____ deals with the human problems associated with inherited disorders

a) behavioral genetics b) developmental counseling c) biopsychology d) genetic counseling