A loan of amount ao, made at time t-0, is to be repaid by 10 annual payments of 1, beginning at time t-1 and ending at time t-10. At time t-4, the borrower has financial troubles and can only pay (1-v5). If he then returns to his original payment schedule of 1 at times t-5 through t-9, how much will his payment at t-10 need to be in order to pay the loan off in full? 10j (A) 1t (B) 1 (C) 1t (D) 1+v (E) v+u