Lilianne is beginning to develop a fear of strangers and will reach for her mother when she sees someone who is unfamiliar. it is likely that lilianne has also just
a. mastered the principle of conservation.
b. overcome the limitation of egocentrism.
c. developed a sense of object permanence.
d. lost her sense of secure attachment.
e. developed a sense of adventure.

The correct option is c

developed a sense of object permanence.

Explanation:

Object permanence is the understanding that objects continue to exist even when they cannot be perceived. This is a fundamental concept studied in the field of development psychology, that addresses the development if young children's social and mental capacities.

answer; strength of association;

answer; rational if melanie values sleep more highly than the benefits she expects to receive from attending the class;