In the United States in the 1950s, Most Children Experienced

Multiple Choice

In the United States in the 1950s, most children experienced their first taste of freedom when they learned to ride a bike and were allowed to ride it unsupervised in their neighborhood. Today, children are much older when they first experience this kind of freedom. The _____ has changed between the 1950s and now.

A) culture
B) temperament
C) evolutionary style
D) genes