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　　Which of the following methods for retiring bonds before maturity is generally considered the most detrimental for the bondholders?
　　A. Tender offers.
　　B. Call provision.
　　C. Sinking fund provision.
　　D. Maintenance and replacement funds.
　　Answer：B
　　The call provision gives the issuer the right to purchase the bonds at a given price, which the issuer would not do unless that price was below the market price. Sinking fund provisions can benefit bondholders because the issuer is obligated to purchase bonds, which improves the creditworthiness of the issue, and the issuer may have to do so at a price higher than the market price. There are no features in M&R funds or tender offers that would be detrimental to bondholders.