英语奥赛题目问：Besides decoration,what was the other purpose of pap

英语奥赛题目问：Besides decoration,what was the other purpose of paper marbling in the past?选项：A.To decorate picture frames and stationary items.B.To create abstract patterns for the animals imagines forbidden by the Muslim religion.C.To create backgrounds for official documents,so that it would be more difficult to forge documents.D.To cover the binding strings and glue marks where the leather cover was attached to the book papers.并选出答案,