In Samuel and Bryant's Study, Conservation Is Best Defined as the Ability

In Samuel and Bryant's study, conservation is best defined as the ability to:

A) Understand that changes in the appearance of an object do not affect, for example, its mass or volume
B) Communicate with children of a similar age
C) Understand that a person in a different location will have a different view of a scene
D) Understand that an object continues to exist even when it is out of sight
E) Look after the natural environment