Dewei Was Carefully Placing His Newborn Son into the Stroller

Dewei was carefully placing his newborn son into the stroller when the family dog raced by, jostling the stroller. Dewei reacted by clutching the baby to his chest, but the baby didn't seem to notice the disruption. What should this tell Dewei?

A) His baby is unusually calm.
B) He has done a good job of protecting his child, so he doesn't startle easily.
C) The lack of responsiveness indicates his newborn may have a brain injury.
D) No conclusion can be made on the basis of this behavior.