Egbert is a quiet child who is very slow to adapt to change. However, if he is introduced gradually to new people or situations, then eventually he will accept them without too much distress. Thomas and Chess would say his temperament is ______

a) active
b) slow-to-warm-up
c) difficult
d) easy

ANS: B, Slow-to-warm-up babies tend be quieter and slow to adapt to change.