A 15-year bond has a face amount (and maturity value) of 1,000. It pays ser ii-annual coupons at an 8% (annual) coupon rate. The bond is callable on any coupon date on or after its 10th anniversary, with a 5% call premium. An investor purchases this bond at a price such that it will yield 7.2%, coapounded semi-annually if it is held to maturity and is not called. W at is the earliest coupon date on which the bond could be called and the investor would earn a rate of return of at least 7.2% (compounded semi- an ually)? A) 30th B) 31st C) 32nd D) 33rd E) 34th