Final answer:
An infant is most likely to look longer at the new picture according to the concept of dishabituation, which signals increased interest in novel stimuli. Thus, the option c is the correct answer.
Step-by-step explanation:
According to dishabituation, which refers to the renewed interest that occurs when a novel stimulus is introduced after habituation has occurred to a different stimulus, an infant will most likely look longer at the new picture. This occurs because the change in the environment, such as a new patterned picture, captures the infant's attention and is perceived as a new and interesting stimulus. This phenomenon is consistent with young infants' tendencies to pay attention to novel visual stimuli, a premise supported by their natural preferences and developmental stages explored by researchers such as Piaget and Ainsworth.