According to paragraph 5, which of the following has been used as evidence to suggest that Upper Paleolithic people were capable of complex thought and conscious awareness of their environment? A. They engraved animal figures on the shafts of spears and other objects. B. They may have used engraved signs to record the phases of the Moon. C. Their figurines represented the human female in exaggerated form. D. They may have used figurines to portray an ideal type or to express a desire for fertility.