D)Although the structure of the office has remained the same, each president has decorated the office in his own way.
I think the answer is D because:
"Located in the West Wing of the White House, the Oval Office represents the power and ^responsibility of the president...Although the structure of the office has remained the same, each president has decorated the office in his own way. The style of the room often changes when a new president takes office. The first Oval Office had green drapes and carpeting. Since then, the drapes and carpeting have been many different colors. Presidents also change the arrangement and types of furniture in the office."
It shows that the president will have have the choice and it's his responsibility to decorate the Oval office.
"The Oval Office is a symbol of the president and will interest the public for generations to come."
The oval office is a symbol of the president, which means that it shows how the president lives and the president's style.
i hope this helps ....
if it does please mark me as brainliest :)