A recording system was so secretly installed and operated in the Kennedy Oval Office that even Theodore C.Sorensen, the White House counsel, did not know it existed.
(A)A recording system was so secretly installed and opetrated in the Kennedy Oval Office that
(E)Installed and operated so secretly in the Kneendy Oval Office was a recording system
我选了E但正确答案是A，我就是不很清楚secretly installed and operated 中secretly是单独修饰installed还是同时修饰installed和operated，这个是不是会产生歧义
adv.+v.+v.结构中adv.是如何修饰后面的词？ | 
