It’s reported that global warming is heating the planet twice as quickly as _____ feared.

A．extremely

B．previously

C．preciously

D．eventually

某托运人准备从上海运往巴黎10枚金币。该托运人欲请货运代理人代为向航空公司交运。作为代理人请回答：

这票货物的声明价值不得超过多少美元？