Final answer:
To achieve dishabituation for an infant habituated to a wall picture, rotating the picture 90 degrees can reintroduce it as novel, triggering renewed interest.
Step-by-step explanation:
To achieve dishabituation in an infant habituated to a patterned picture on the wall, introducing a significant change to the environment is required. Dishabituation refers to the process where a previously habituated response recovers as a result of presenting a novel stimulus. Therefore, the best option to achieve dishabituation among the given choices would be D. Rotate the photo 90 degrees. This alteration of the patterned picture's orientation can be sufficient to reintroduce the stimulus as 'new' to the infant, thereby triggering a renewal of interest and attention. While playing a new sound may temporarily attract the infant's attention, it does not directly alter the habituated stimulus (the patterned picture) and might not be as effective in re-engaging the infant's initial response to the visual stimulus.