一篇英语阅读Nearly everyone agrees that money doesn’t buy as much

一篇英语阅读
Nearly everyone agrees that money doesn’t buy as much as it used to,no matter where you want to spend it,.This is certainly true of the paper money that passes so quickly through one’s hands.Inflation(通货膨胀)eats away at its buying power just as the steady appetite of waves chews at sand cliffs.But what about coins that seem to do very little except clutter(塞满) up purses and pockets?Unlike notes,metal money becomes more valuable the longer it is held,especially if it is put away where is won’t get scratched or worn.Why is this?One reason is that coins,being more durable(耐久),fall more readily into a category for collectors.Naturally,the rarer gold pieces must become more valuable as the piece of this metal goes up.
But,curiously,one of the rarest coins in the world is not made of gold,but of the relatively cheaper sliver.In 1840,the United States mint(造纸厂) struck 19570 sliver dollars.That is what its records show.Today only six of this original number remain and these are unlikely ever to reach the auction market.So what happened to some 19564 large silver coins,not the easiest sort of things to lose?One of the more romantic theories is that they were part of the payment to Napoleon for the American territory then known as Louisiana.But they never reached France.Somewhere in the Culf of Mexico,the ship transporting them was sunk,either by a storm or by priates(海盗).The probable answer to the mystery is that they were melted down since the silver value was greater than the actual value of the coin.What really happened to the rest will probably always remain a mystery.What is known is that whoever can come up with one will find himself instantly rich.
It can be inferred from the passage that____
B.money does not buy as much as it did before
D.metal money buys more than paper money.
答案是B但是我觉得是D.
题干中的infer 应该说明是推断出的 B是原文中基本完全一样的
D也没错阿

Unlike notes,metal money becomes more valuable the longer it is held,especially if it is put away where is won’t get scratched or worn.Why is this?One reason is that coins,being more durable(耐久),fall more readily into a category for collectors.Naturally,the rarer gold pieces must become more valuable as the piece of this metal goes up.
原文并没把metal money paper money直接做价值的对比.所以虽然infer也得选