It Is Generally the Case That Most Great Scientists Have

Multiple Choice

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) White matter in the brain substantially decreases from middle to late adulthood.
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.