Five years ago, as part of a plan to encourage citizens of Levaska to increase the amount of money they put into savings, Levaska's government introduced special savings accounts in which up to $3,000 a year can be saved with no tax due on the interest unless money is withdrawn before the account holder reaches the age of sixty-five. Millions of dollars have accumulated in the special accounts, so the government's plan is obviously working.

Which of the following, if true, most seriously weakens the argument?

• AA substantial number of Levaskans have withdrawn at least some of the money they had invested in the special accounts.  
• BWorkers in Levaska who already save money in long-term tax-free accounts that are offered through their workplace cannot take advantage of the special savings accounts introduced by the government.  
• CThe rate at which interest earned on money deposited in regular savings accounts is taxed depends on the income bracket of the account holder.  
• DMany Levaskans who already had long-term savings have steadily been transferring those savings into the special accounts.  
• EMany of the economists who now claim that the government's plan has been successful criticized it when it was introduced.