单选题 从左到右转录DNA片段3'-ATTCAG-5'，5'-TAAGTC-3'，其产物为

• A.5'-CACUUA-3'
• B.5'-AUUCAG-3'
• C.5'-UAAGUC-3'
• D.5'-CTGAAT-3'
• E.5'-ATTCAG-3'