Company A plans to issue a 10-year bond to borrow $10 million in the market. The current market interest rate is 9%. Company A thinks that in a few years' time the interest rate will decrease. The managers of company A discuss the payment provisions that can be attached to the bond: (a) call provision; (b) sinking fund; (c) convertible provision. What type(s) of payment provisions should Company A use? Briefly explain the reasons behind.