As sales of cars and light trucks made in North America were declining 13.6 percent in late February, many analysts conclude that evidence of a recovering automotive market remains slight.
(A) As sales of cars and light trucks made in North America were declining 13.6 percent in late February, many analysts conclude
(B) Since sales of cars and light trucks made in North America declined 13.6 percent in late February, and many analysts conclude
(C) With sales of cars and light trucks made in North America declining 13.6 percent in late February, with many analysts concluding
(D) Because sales of cars and light trucks made in North America declined 13.6 percent in late February, many analysts
concluded
(E) Because of sales of cars and light trucks made in North America declining 13.6 percent in late February, therefore, many analysts concluded
E肯定错，because of 和therefore 是不能连在一起用的
C也错，with……和 with……，只是两个with短语的叠加，根本就没有完整的句子出来。
B也错，因为since引导状语从句（好似是状语从句），而and连接2个并列句，主从句是不能这样并列用的。要不就since, 要不就and。
A、B、C错，我觉得是因为时态不正确。主从句的时态是要一致的，既然从句用过去时，那么主句也应该用过去时，应该是concluded。
答案是不是D呢？
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