Under Typical Circumstances, What Happens to the Primitive Reflexes, Such

Under typical circumstances, what happens to the primitive reflexes, such as the palmar grasp?

A) They are present at birth and then disappear within a few months after birth.
B) They are present at birth and do not disappear until a child reaches preschool age.
C) They are not present at birth and appear sometime in the first 3 to 6 months of age, and then disappear by 1 year of age.
D) They are present at birth and never disappear.