SC難問？？＃3

Though initially opposed to the measure, the governor approved the new needle-exchange program at the urging of his own doctor, his chief advisers, and a coalition of some twenty social action groups.

a)at the urging of his own doctor, his chief advisers, and a coalition of some
b)as a consequence of having been urged by his own doctor, his chief advisers, and a coalition of some
c)on account of being urged by his own doctor, chief advisers, and a coalition of
d)as he was urged to do so by his own doctor, his chief advisers, and a coalition of some
e)as his own doctor was urging him to do so, along with his chief advisers, and a coalition of
正解はa)です。疑問点はd)の駄目は理由です。
どなたか教えて頂けますか。

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