In a normal brain, the two cerebral hemispheres communicate with one another across the corpus callosum

The Japanese head the list of developed countries of the world in performing heart transplants

Indicate whether the statement is true or false

Among four- to eight-month-old infants, secondary circular reactions will most often be directed toward

a. the infant's memories of prenatal life in the womb. b. an imagined caregiver who is absent. c. external objects such as toys. d. the infant's own body.