There are four bonds available, A, B, C, and D, with maturities 6, 2, 10, and 13 years, respectively. Which one of the following portfolios is associated with the minimum level of interest rate risk?

Group of answer choices

A) 50%-50% portfolio of bonds B and C

B) 50%-50% portfolio of bonds B and D

C) 50%-50% portfolio of bonds A and C

D) 50%-50% portfolio of bonds A and B