Which best explains how the structure of the executive office of the president helps fulfill Presidency’s office’s role? The office is led by the chief of staff, who serves as a key adviser to the president.
The office has multiple levels of staff and advisers who help the president in many areas.
The office is led by the vice president, who serves as a key adviser to the president.
The office has a single level of staff and advisers who help the president in many areas.

The best explanation to the structure of the executive office is that The office has multiple levels of staff and advisers who help the president in many areas.

This is the office of the president of the United States. The people that are there to help the president fulfill his role are the members of his cabinet.

The president is responsible for choosing these people.

Read more on the executive office here:

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The office has multiple levels of staff and advisers who help the president in many areas.

Explanation:

The Executive Office of the President is responsible for activities varying from connecting the President to the American people efficiently to the advancement of American commercial interests overseas.  It was started by the then President Franklin D. Roosevelt in 1939 to help the president govern the country effectively. The Chief of Staff of the White House manages the EOP and it has historically hosted many closest aides and advisors of the President of USA.

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explanation:

i think that this is the best answer, but im sorry if this is wrong