Dear Team at Manhattan Prep,
I'm sorry but I did not understand the explanation given by Mr. Sanders above for option E. I respect his perspective, but can you point any other reason to eliminate choice E, as I believe I cannot eliminate it merely on the basis that it has an inverted structure.
I'm posting the question again so that you don't have to scroll again and again.
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 operated in the Kennedy Oval Office that
B. So secret was a recording system installation and operation in the Kennedy Oval Office
C. It was so secret that a recording system was installed and operated in the Kennedy Oval Office
D. A recording system that was so secretly installed and operated in the Kennedy Oval Office
E. Installed and operated so secretly in the Kennedy Oval was a recording system that
Warm Regards