You are trying to find the correct yield difference between a 7-year maturity bond rated A+, and a 7-year maturity bond rated AAA. You find that a 7-year maturity, AA-rated bonds yield is 65 basis points greater than an AAA-rated bond, while that of a 7-year maturity A-rated bonds yield is 80 basis points greater. Which of the following should be a possibility for the yield difference of the A+ rated bond? (100 basis points equals 1%. No calculations needed).

a) 64 basis points

b) 70 basis points

c) 80 basis points

d) Both (b) and (c) are possible spreads for the bond