[SC悬赏令] 求助一道曼哈顿语法题~

One study found that although government policy and the industrial sector in which a company operates can influence its productivity and financial strength,management decisions have at least as great an impact on a company’s performance.

		management decisions have at least as great an impact
		decisions by management have a great impact
		manager decisions impact greatly
		decisions by a company’s management impact greatly
		what a company’s management decides has a greater impact

如题，求助各位，谢谢啦~