单选题 Somebody bought some pencils and rubbers in a shop. What's the price for each pencil?
(1)he paid 215 cents for 2 pencils and 3rubbers
(2)he should have bought 8 pencils and12 rubbers if he paid 860 cents.
(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．