The fact that cultural groups with less exposure to carpentered buildings are less susceptible to the Müller-Lyer illusion suggests that: A. not all cultures test perceptual hypotheses. B. people in technologically advanced cultures are more gullible C. illusions can be experienced only by cultures that have been exposed to the concept of illusions. D. perceptual inferences can be shaped by experience.

First, let's review the information provided. The Müller-Lyer illusion is a visual illusion where two lines of equal length appear to be of different lengths because of the angles of the arrowheads at the ends of the lines. The statement suggests that cultural groups with less exposure to carpentered buildings are less susceptible to the illusion.

Now, we will analyze the options to determine which best describes the relationship between the illusion and exposure to carpentered buildings: A. Not all cultures test perceptual hypotheses: This option is not directly related to the provided information and does not sufficiently explain the observation. B. People in technologically advanced cultures are more gullible: This option is misleading and does not explain why some cultural groups are less susceptible to the illusion based on their exposure to carpentered buildings. C. Illusions can be experienced only by cultures that have been exposed to the concept of illusions: This option is not accurate as illusions can occur in any culture, and the given information only suggests that exposure to carpentered buildings influence the susceptibility to this specific illusion. D. Perceptual inferences can be shaped by experience: This option is the most accurate statement as it relates to the observation that exposure to carpentered buildings may influence one's perception of the Müller-Lyer illusion. It suggests that experiences, such as those with carpentered buildings, can impact the inferences we make when perceiving the world around us.

Based on the analysis of all the options, the most appropriate answer is: D. Perceptual inferences can be shaped by experience.