Diane was shy and lacks confidence as a teenager. at age 62, she is still unlikely to initiate a conversation but feels confident in her abilities and life choices. in explaining diane's personality development, costa and mccrae's baltimore study would most likely emphasize whereas the berkeley longitudinal studies would emphasize

stability ; change

Explanation:

There are three longitudinal studies that basically help us to study the extend to which whether is stability or change in human personality o behavior. This includes --

(1) Costa and McCrae's Baltimore Study

(2) Vaillant's Studies

(3) Berkeley Longitudinal Studies

Costa and McCrae's Baltimore logitudinal study :

Their study focuses on five factors that influence personality. They studied and concluded that the personality remains stable though out the adult years because of the five factors of personality.

Berkeley Longitudinal Studies :

Berkeley supports the change in the personality development in the adult phase of human being.

Diana when young was shy and did not have confidence to interact with others. But at adulthood at the age of 65, she feels confident in her abilities but is still not able to interact confidently.

Thus the answer is ---

stability ; change

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)