Correct option is C
The correct answer is The material chosen should be made by the children only and have some roughness to avoid slipperiness. This criterion is impractical for several reasons. First, expecting all materials to be made by children limits the quality and variety of educational tools that can enhance learning. Professional educational materials are designed based on pedagogical research and user safety standards, which might not be achievable with child-made materials. Additionally, the attribute of 'roughness' is specific and not universally applicable across different types of learning materials, making it an unsuitable criterion for general TLM selection.