TOEFL Listening: TPO-TOEFL阅读TPO - 2449RI93G2I431EJN$

According to paragraph 3, why were certain areas of a stone statue left uncarved? A. To prevent damage by providing physical stability B. To emphasize that the material was as important as the figure itself C. To emphasize that the figure was not meant to be a real human being D. To provide another artist with the chance to finish the carving