The answer is d
none of the others involved the US
A Smithsonian Institution is not housed in a department, but is rather headed by an administrator who reports directly to the president. This is further explained below.
<h3>What is Smithsonian Institution?</h3>
Generally, The Smithsonian Institution is simply defined as the biggest museum, educational, and research complex in the world.
In conclusion, They report directly to the president and are considered an executive agency.
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