There are 3 bonds in a portfolio as follows:

Bond A: 8 years to maturity, par value $1,000, yield to maturity = coupon rate 5%

Bond B: 10 years to maturity, par value $1,000, yield to maturity = coupon rate 7%

Bond C: 12 years to maturity, par value $1,000, yield to maturity = coupon rate 9%

In light of recent macroeconomic turmoil, the yields to maturity change as follows:

Bond A: a rise of 2%

Bond B: a rise of 3%

Bond C: a rise of 4%

How would the yield curve change?

A. Positive butterfly shift

B. Steepened Curve

C. Upward parallel shift

D. Downward parallel shift

E. Negative butterfly shift