In 2015, a customer buys 1 GE 10%, $1,000 par debenture, M '40, at 120. The interest payment dates are Jan 1st and Jul 1st. The bond is callable in 3 years at an 8% call premium. The yield to call on the bond is:

A. 5.26%
B. 8.00%
C. 8.37%
D. 10.23%