Final answer:
Newborn infants from 0 to 6 weeks respond to both social and non-social stimuli.
Step-by-step explanation:
The correct answer to the question is c. both social and non-social stimuli. From 0 to 6 weeks, infants respond to both social and non-social stimuli. For example, newborns show a preference for faces and human voices, indicating their responsiveness to social stimuli. They also have the ability to distinguish their own mother's scent from others, demonstrating their sensitivity to non-social stimuli.