What Explanation Best Describes How Preschoolers React to the Death

What explanation best describes how preschoolers react to the death of a loved one?

A) Grief is acute but does not last long at this age.
B) Children this age are too young to have a concept of death.
C) Preschoolers may feel guilty and responsible for the death.
D) They express grief in the same way that the adults in the preschoolers' life are expressing grief.