Which of the following statements is true of brain development in humans?
Select one:
O a. At birth, there are only 10 to 20 billion neurons in the infant brain.
O b. The dendrites of neurons branch out and the neurons become interconnected during adulthood
O c. During childhood, synaptic connections in the brain increase dramatically.
O d. From 3 to 6 years of age, the most rapid growth takes place in the parietal lobe of the brain.