【多选题】哪些“退报原因”填列正确?

【多选题】哪些“退报原因”填列正确?

A.“REFUND AS PER BNF’S REQUEST ”

B.“RTN AT PER SDN'S REQ”

C.“REFUND AS NO ANSWER AFTER INV”

D.“REFUND AS DUPL”

正确答案是ACD