| Chinese, the most ancient of living writing systems, consists of tens of thousands of ideographic characters, each character a miniature calligraphic composition inside its own square frame. (A) each character a miniature calligraphic composition inside its (B) all the characters a miniature calligraphic composition inside their (C) all the characters a miniature calligraphic composition inside its (D) every character a miniature calligraphic composition inside their（A）
(E) each character a miniature calligraphic composition inside their
请问：character的词性，its的指代 | 
