求助一道数学老题 自己想不通

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If the market value fo a car is $6000,exactly 3 years ago,what is its current market value?
1.Starting at the time of purchase,the market value of the car depreciated by 20% of its purchase price per year.
2.the current market value of a car manufactured in the year is $2400.(A) statement 1.alone is sufficient,but statement 2.alone is not sufficient.. I1 O# T( O3 o0 |+ i0 A/ Q
(B) statement 2.alone is sufficient,but statement 1.alone is not sufficient.# f8 L$ V* v* [* {) {* I
(C)Both the two statements together are sufficient,but neither statement alone is sufficient.( m/ L3 ~+ E; p" v
(D)Each  statement alone is  sufficient.  N4 v: y# {+ N6 u2 k3 r- T! f
(E)Statement 1.and 2.together are not sufficient. : M) q9 V2 ~; t' e; ~- z据说答案是E 但是我想选D 我觉得很多人都会选D







据说