A Child Drowned While Swimming in a Local Lake 2

A child drowned while swimming in a local lake 2 years ago. Which behaviour indicates the child's parents are mourning in an effective way?

A) The parents who forbid their other children to go swimming
B) The parents who keep a place set for the dead child at the family dinner table
C) The parents who sealed their child's room exactly as the child left it 2 years ago
D) The parents who throw flowers on the lake at each anniversary date of the accident