Question 1: Choose the correct answer to the following question: Given the following materials: plastic, glass, ceramic, limestone, steel. The number of man-made materials is:

Question 1: Choose the correct answer to the following question: Given the following materials: plastic, glass, ceramic, limestone, steel. The number of man-made materials is: A. Plastic, glass, ceramic, steel B. plastic, glass, ceramic C. glass, ceramic, limestone D. glass, ceramic, limestone, steel Answer A Man-made materials are man-made: plastic, glass, ceramic, steel. ===============

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