Consider a One-Factor HJM Model Where the Initial Forward Curve $T$

Consider a one-factor HJM model where the initial forward curve is given as 6% for one year and 7% between one and two years.The evolution of continuously-compounded one-year forward rates beginning at time $T$ ,is given by the following binomial process: $f ( t + 1 , T ) = f ( t , T ) + \alpha \pm 0.02$ ,where the up and down movements are equiprobable.What is the price of a one-year call option on a two-year 6.5% coupon bond,with a strike price of $100 ex-coupon?

A) 0.50
B) 0.55
C) 0.60
D) 0.65