What Was the Purpose of the Fixed-Array Condition in the Samuel

What was the purpose of the fixed-array condition in the Samuel and Bryant study?

A) To see whether asking only one question increased the ability to conserve
B) To prevent children being confused by the transformation
C) To find out which children prefer the number (counter) condition
D) To show that children who coped successfully with the other conditions did so because they used information from the pre-transformation display
E) To see which children could not conserve