When 12-Month-Olds Saw an Experimenter Look at and Demonstrate an Interest

When 12-month-olds saw an experimenter look at and demonstrate an interest in one of two toy stuffed kittens, they:

A) were surprised when the experimenter then held the other kitten.
B) were not surprised when the experimenter then held the other kitten.
C) were surprised when the experimenter held that kitten.
D) responded similarly no matter which kitten the experimenter held.