Stephen: I want to send this package parcel post registered. Clerk: ______? Stephen: Yes

Stephen: I want to send this package parcel post, registered. Clerk: ______？ Stephen: Yes, please, for sixty dollars.

A．Do you want it guaranteed

B．Do you want it insured

C．Do you want it preserved

D．Do you want it ensured

请帮忙给出正确答案和分析，谢谢！