17. U is a monopoly producer for a special device； yet, they do not have a sales department. In a small town K, there are two retailers, D1 and D2, selling this device. U proposes a take-it-or-leave-it offer for D1 and D2； then, D1 and D2 engage in Bertrand price competition. The total demand in this town for the special device is Q(P) = 1000-5P. The average variable cost for U to produce this device is 45. While selling devices, D1 and D2 will not incur additional cost. No fixed cost for U, D1 and D2. The retailing price or the wholesale price can be only an integer. What is the possble retailing price in which D1 sells this special device?
(A) 46
(B) 92
(C) 123
(D) 161