The labels "easy" and "difficult" are used to refer to differences among infants in

A) maturation.
B) cognition.
C) temperament.
D) attachment.

Temperament

An individual's natural disposition that influences their behavior and emotional responses, often considered to be innate rather than learned.

Attachment

The emotional bond that forms between individuals, such as between a child and caregiver, influencing personal development and behavior.

Cognition

Learning and understanding acquired through the methods of thinking, experiencing, and sensing.