When we say rational people make decisions at the margin, we are saying that people:
O compare the additional costs and additional benefits of only the current choice.
O compare the total costs and additional benefits of only the current choice.
O compare the additional costs and additional benefits of only the past choices.
O compare the additional costs and additional benefits of the current choice and past choices.

Jallouk corporation has two different bonds currently outstanding. bond m has a face value of $50,000 and matures in 20 years. the bond makes no payments for the first six years, then pays $2,100 every six months over the subsequent eight years, and finally pays $2,400 every six months over the last six years. bond n also has a face value of $50,000 and a maturity of 20 years; it makes no coupon payments over the life of the bond. the required return on both these bonds is 10 percent compounded semiannually. what is the current price of bond m and bond n?