Five-year-old David watches as you pour water from a short, wide glass into a tall, narrow one. He says there is now more water than before. This response demonstrates that: A. David understands the...

Five-year-old David watches as you pour water from a short, wide glass into a tall, narrow one. He says there is now more water than before. This response demonstrates that:

A. David understands the concept of conservation.

B. David does not understand the concept of conservation.

C. David’s cognitive development is “behind” for his age.

D. both B and C are happening.