During which of Jean Piaget's stages do children master the concept of conservation?

According to Kübler-Ross, most people who reach acceptance

A) avoid discussions with doctors and family members to escape from the prospect of death. B) realize the inevitability of death but attempt to bargain for extra time. C) do so only in the last weeks or days before death. D) become despondent and depressed in the last days before death.

A shared notion of reality that is widely accepted but is a function of society and culture at a given time is/are called

a) topical areas of lifespan development. b) social construction. c) age ranges. d) social development.