Which of these is the best example of a child's lack of conservation?
A. Ten-year-old Martha eats her lunch before she gets to school
B. Seven-year-old Irene knows that five pennies is not more money than one nickel
C. Four-year-old Dale is afraid of the trolls that live under his bed
D. Three-year-old Jake thinks he has more cookies than his sister, because his one cookie is broken into two pieces