Along the major rivers that traverse the deserts of northeast Africa, the Middle East, and northwest India, the combination of a reliable supply of water and good growing conditions both encouraged farming traditions that, in places, endure in at least 6,000 years.


good growing conditions both encouraged farming traditions that, in places, endure in

good growing conditions encouraged farming traditions that have, in places, endured for

of good growing conditions have encouraged farming traditions that, in places, endured for

of good growing conditions both encouraged farming traditions that have, in places, endured

of good growing conditions encouraged farming traditions that have, in places, been enduring for

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题目分析：
由于语法结构不同，所以在(A)(B)中，具有and关系的两者为water和good growing conditions；在(C)(D)(E)中，具有and关系的两者为a reliable supply of water和good growing conditions。在逻辑上，具有and关系的两者应该保持对等。显然地，“水”和“好的生长条件”在逻辑上是对等的，因此可以排除(C)(D)(E)。此外，(A)中的both没有必要加入，可以排除，答案为(B)。

选项分析：

略

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