In Piaget's Theory, When a Child Demonstrates Conservation, He or She

In Piaget's theory, when a child demonstrates conservation, he or she:

A) understands the importance of protecting environmental resources.
B) becomes aware of cultural differences.
C) recognizes that two equal quantities remain equal, even if the appearance of one is changed, as long as nothing is added or subtracted.
D) is limited by the inability to reverse mental operations and the tendency to focus on only one aspect of a situation.