Aregion that is administered by the united states government is an example of a region.
a. cultural
b. physical
c. political
d. spatial

The correct answer is - C. political.

Since the region is administrated by the United States, and we do not have any other information about this region, than it is the safest to say that we are talking about a political region.

The reason why this would be a political region is that the United States are administrating it. That being said, the United States have implemented their politics on the region, control the functioning of the region, and have economic and military power over it as well.

Political regions like this do exist, that are administrated by the United States, like Guam and American Samoa for example.