34. Imagine a baby about five months old. It can cry and smile, and it can eat and sleep. Did you know a baby can also count? 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
already present in small babies.
d. very difficult for children to learn