The subjects of famous American artists of the mid-1800s are Option B and D are correct North American birds and abstract images.
In the mid-nineteenth century, several notable artists in the United States had acquired their training in Europe.
On this continent, many of the world's finest musicians have performed. As a result, Europe was the best place to develop artistic genius.
The other Options are incorrect as:
Thus Option B and D are the subjects of famous American artists.
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