You are considering two Treasury bond portfolios. One is a barbell comprised of two bonds with maturities of 3 years and 16 years, the other is a bullet comprised of a single bond with a maturity of 9 years. The two portfolios are constructed to have the same modified durations, however the barbell portfolio has significantly higher convexity. If you predict a large upward parallel shift of the yield curve, what should you do?

a. Invest 100% of funds in the bullet

b. Invest 100% in the barbell

c. Invest equal proportions in the bullet and the barbell