A Friend Is Worried About His Son,who Is Very Active

A friend is worried about his son,who is very active and is constantly injuring himself.What would you tell him to help him worry less? This behavior is very typical because his son's ____.

A) motor development is advanced enough to do quite a bit,but his cognitive development is not able to anticipate situations that might be dangerous
B) motor development is not yet very advanced and he is going to be involved in many accidents
C) visual processing is lagging behind his motor development and he simply cannot see very well
D) attention skills are not yet fully developed and his son is likely to not pay attention to his father's warnings to be careful