[請益] primary driver?

[zoe20080 (Pray for U)]

題目是
what seems to have been the primary driver of
Argentina's current account between 1998 and 2000?

答案是
imcome debit

請問這個primary driver該怎麼翻譯比較洽當？
driver是有類似驅使的意思嗎？

謝謝:-)

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→ hotfuzzmilli:driver確實是驅使者的意思，可以說主要動力/原因
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→ hotfuzzmilli:這個情況下應該是主要原因比較接近吧