Gold being quite inconvenient to carry around for spending purposes, inevitably governments issued paper certificates that were pledged to be redeemable in gold metal.

Gold being quite inconvenient to carry around for spending purposes, inevitably governments issued paper certificates that were pledged to be redeemable in gold metal.

A.黄金非常不便于携带用于消费，因此政府会发行并保证可以兑换成金属的纸质证明书。

B.既然因为购物需要而携带黄金很不方便，各国政府就发行作为纸币发行的证书，保证这些证书可以兑现黄金。

C.政府通过发行纸质证明书，并保证这些证明书可以兑换成金属解决了黄金非常不便于携带用于消费目的问题。

D.既然因为购物需要而携带黄金很不方便，各国政府就发行作为纸币发行的证书通过保证它可以兑换成金属用来方便交易。

正确答案是B