Imagine a baby about five months old. It can cry and smile, and it can eat and sleep. Do you
know a baby can also count at this age? According to new psychological research, a small
baby can even add and subtract small numbers of objects. People generally think that these
abilities are learned much later, but in fact they are _____________________.
a. not present until adulthood
b. learned only by five-month-old babies
c. already present in small babies
d. very difficult for children to learn