一题SC，没有在CD上找到答案……

that personal spending in the July-September quarter more than doubled that of

that personal spending in the July-September quarter would more than double

of personal spending in the July-September quarter, that it more than doubled

of personal spending in the July-September quarter more than doubling that of

of personal spending in the July-September quarter, that it would more than double that of   这题答案选B，但是我没有搞懂AB选项中，从句的谓语动词在哪儿啊……感觉double做谓语动词有点奇怪……