Research by Chess and Thomas has indicated that the temperaments of most children are

A) easy.
B) difficult.
C) securely attached.
D) not able to be placed in a specific category of temperament.

Temperaments

The innate aspects of an individual's personality, such as introversion or extroversion, that are often evident from infancy and are relatively stable over time.

Chess and Thomas

Researchers known for their categorization of children's temperaments into three basic types: easy, difficult, and slow-to-warm-up.