A three-year-old child explains that milk is produced by a machine at the milk booth. Which one of the following offers the best explanation of the child's understanding?

• A. The child has very limited exposure of the world.
• B. The child's answer is based on his/her experience of buying milk from the milk booth.
• C. The child has never seen cows.
• D. The child’s family does not offer a stimulating environment to the child.