请教GWD语法题一道

GWD 5 - 18

Antarctica receives more solar radiation than does any other place on Earth, yet the temperatures are so cold and the ice cap is reflective, so that little polar ice melts during the summer; otherwise, the water levels of the oceans would rise 250 feet and engulf most of the world’s great cities.

1. is reflective, so that little polar ice melts during the summer; otherwise,
2. is so reflective that little of the polar ice melts during the summer; were it to do so,
3. so reflective that little polar ice melts during the summer, or else
4. reflective, so that little of the polar ice melts during the summer, or
5. reflects so that little of the polar ice melts during the summer; if it did

答案：B

想问一下B把原题的little polar ice改成了little of the polar ice，这样没有问题么？

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OG上有没有我记不得了，但是我看白勇语法上面确实有提到过类似的知识点地

哪位牛人解释一下啊？谢啦

哦，明白啦，谢谢哈