单选题：Questions are based on the following passage.Most people wo

Questions are based on the following passage.
Most people would not pay two cents for something worth one. But America's government spent $116m last year doing just that. The money-losing purchase was money itself: the penny, which has cost more than a cent to produce since 2006, due mainly to the price of zinc(锌), the coin's primary ingredient.
Steel is not much better, as Canada has learned. The government there recently abandoned its steel- based penny. American politicians, while unwilling to take lessons from their northern neighbors, may have noticed. In an online forum on February 14th Barack Obama intimated that the penny was no longer change he believes in.
Fifty years ago a handful of pennies would buy a hamburger at McDonald's, but inflation means the coin won't even get you one French fry today. The penny is falling to perform its primary function: to facilitate commerce. Vending machines and parking meters don't accept it. Penny critics note that dealing with them adds some two seconds to each transaction, costing the economy many millions of dollars a year.
Penny lovers and zinc-industry lobbyists(游说者) counter that the coin's removal would cost consumers, as merchants would round prices up to the nearest nickel. Some economists disagree, suggesting that shop keepers might in fact round down in order to avoid moving from a price of, say, $ 9.99 to $10. Americans anyway seem willing to accept a fee for penny removal, as evidenced by the self-imposed cost of leaving them idle and the success of coin-counting machines, which take a cut when turning them into bills.
Other countries have eliminated low-value coins with less-than-scary results, and indeed, so has America. In 1857 it abandoned the half-cent, then worth nearly as much in real terms as today's dime. This has led some to suggest killing the nickel, which costs about ten cents to make, as well as the penny. Congress has not authorized coin culling as yet, so the Mint is studying ways to make pennies more cheaplv.
56. According to Paragraph 1, which of the following is true? A．The coins in America are purely made out of zinc.
B．Penny is literally not worth the metal it's made of.
C．The price of zinc has doubled since 2006.
D．America's government spent $ 116m in making coins.