Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.

• ANeuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are  
• BNeuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are  
• CNeuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are  
• DNeuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,  
• ENeuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood,