单选题 Literature is essentially regarded as of permanent worth. Printing and, in earlier days, the copying of ______ are the means of preserving written literature.

A、 matrimony
B、 maturation
C、 manuscripts
D、 manifestoes

【正确答案】 C

【答案解析】[解析] 此句在讲书面语言手稿的保存，而A项意指“婚姻关系”，B项意指“成熟”，D项意指“宣言”，所以只有C项(手稿)才符合该句的语境。