As Children Watched,Dr

Multiple Choice

As children watched,Dr.Vallance poured the same amount of juice into two identical glasses.Then she poured the juice from one of those glasses into a taller,narrower glass.When asked which glass now has more juice,children in the concrete operational stage say that:

A) the tall glass has more.
B) both glasses have the same amount.
C) they don't know.
D) the tall glass has less.