问题详情

A．Marksandthumbprints,andprinted,typed,orstampedsignaturesareacceptableinadditiontowrittenones.
B．Marksandthumbprints,butprinted,typed,orstampedsignaturesareacceptableinadditiontowrittenones.
C．Marksandthumbprints,butprinted,typed,orstampedsignaturesarenotacceptable.
D．Marksandthumbprintsonly.

请帮忙给出正确答案和分析，谢谢！