A Mother of a Newborn Tells Her Doctor,"Something Touches My

A mother of a newborn tells her doctor,"Something touches my baby's cheek;she turns towards it and begins to suck." Her doctor should respond by saying:

A) "This is abnormal.Go get medical help."
B) "This is normal.It's called the sucking reflex."
C) "This is great! Your baby will be intellectually advanced."
D) "This is normal.It's called the rooting reflex."