Infants who are experiencing stranger anxiety will be more afraid of which of the following types of people?

A) cheerful
B) smiling
C) unsmiling
D) outgoing

Stranger Anxiety

An infant’s fear of and wariness toward strangers; it tends to appear in the second half of the first year of life.

Unsmiling

Displaying a serious or stern expression, without smiles.

Cheerful

Exhibiting a disposition that is full of joy and optimism.