Dr Developmental Repeatedly Presented an Infant with a Photo of a Woman

Dr. Developmental repeatedly presented an infant with a photo of a woman until the infant got used to the photo. The researcher then simultaneously showed the infant the old photo and a new photo of a woman. Dr. Developmental could conclude that the infant can discriminate between the two photos if the infant

A) looks at both pictures for the same amount of time.
B) refuses to look at either picture.
C) looks at the old photo longer than the new photo.
D) looks at the new photo longer than the old photo.