The executive office of the President in the country of US is led by the chief of staff.
Option C is correct.
The executive office had been established by Roosevelt in the year 1939 during his own presidency rule over the US country. He induced the Congress house to set up it.
The executive office had been created to provide the needed assistance to President in carrying out the regular activities at the federal government. The chief of staff act as an intermediary between the Cabinet minister of President and the White House of US country. All the activities in relation to the President are to be overlooked by the chief of staff. He acts as a secretary to the President. He/she gives advices and opinions regarding the policy related matters.
Therefore, the chief of staff is the one who led the executive office of US President.
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