Sadik Inc.'s bonds currently sell for $1,280 and have a par value of $1,000. They pay a $135 annual coupon and have a 15-year maturity, but they can be called in 5 years at $1,050. What is their yield to call (YTC)?
A. 6.39%
B. 6.72%
C. 7.08%
D. 7.45%
E. 7.82%