Platinum is a relatively rare metal vital to a wide variety of industries. Xagor Corporation, a major producer of platinum, has its production plant in a country that will soon begin imposing an export tax on platinum sold and shipped to customers abroad. As a consequence, the price of platinum on the world market is bound to rise.
Which of the following, if true, tends to confirm the conclusion above?
【选项】An inexpensive substitute for platinum has been developed and will be available to industry for the first time this month.