Inactive Tutor answered 19d
A. Compared with a difficult temperament, a slow-to-warm temperament generally involves milder reactions and gradual adjustment to unfamiliar situations. Difficult temperament is associated with greater risk of emotional and behavioral adjustment problems.
However, “more optimal development in adolescence” is an oversimplification: outcomes depend substantially on the goodness of fit between a child’s temperament and their environment, not temperament type alone.