单选题 A jewelry dealer initially offered a bracelet for sale at an asking price that would give a profit to the dealer of 40 percent of the original cost. What was the original cost of the bracelet?
(1)After reducing this asking price by 10 percent, the jewelry dealer sold the bracelet at a profit of $403.
(2)The Jewelry dealer sold the bracelet for $1,953.

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、 (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．

【正确答案】 A

【答案解析】[解析] 设这个手镯的原价为x美元，则其最初的要价为(1+40%)x美元，根据(1)可得：
(1-10%)(1+40%)x-x
=403→x=1550美元
所以(1)充分；(2)不充分，因为该珠宝商是否以其最初的要价售出这个手镯不得而知，从而也就无法求出该手镯的原价。