Conservation Task Relates to Which of the Following Statements

Conservation task relates to which of the following statements?

A) Tests children's understanding that the physical characteristics of an object, substance or quantity remain the same even though their physical appearance may change
B) A technique in which the child's learning environment is structured into small groups of peers who work together toward a common goal
C) Refers to an interrelated set of actions, memories, thoughts or strategies that are employed to predict and understand the environment
D) The process by which important features of an object are picked out so that a mental representation can be formed