The Following 3-Year-Olds Are Asked to Count the Number of Fingers

The following 3-year-olds are asked to count the number of fingers they have on their left hand. Assuming that they each have five fingers, who best illustrates the one-to-one principle?

A) Bobby, who says, "1, 4, 2!"
B) Hannah, who says, "5, 3, 1, blastoff!"
C) Ben, who says, "One hand has five fingers"
D) Colby, who says, "1, 2, C, D, F."