Robert Sternberg (1998) Has Argued That Abilities Reflect Developing Expertise

Robert Sternberg (1998) has argued that abilities reflect developing expertise. The important implication of this is that

A) the development of expertise should be correlated with chronological age.
B) abilities, like expertise, can be taught.
C) the development of expertise should be correlated with mental age.
D) mental age in a particular domain is best estimated by experts in that domain.