Aubrey Always Goes to Sleep at the Same Time

Aubrey always goes to sleep at the same time. She has a few favorite foods and she generally does not complain about trying new foods. Although she is cautious around new people, she adjusts well to new environments. She cries when separated from her parents, but it appears to be an age-appropriate reaction to separation. Her parents report that she is friendly and happy. When she wants something but is told "no," the intensity of her reaction is generally mild to moderate. Aubrey's same-age peers enjoy playing with her. Which category of temperament does Aubrey fit?

A) easy
B) difficult
C) slow-to-warm
D) goodness-of-fit