Context: Figure: Great Basin Desert.
The Great Basin Desert is a cold desert ecosystem in the western United States that covers much of Nevada. This desert also covers parts of Utah, California, and Idaho.
Which statement describes the Great Basin Desert ecosystem?
A. It has warm summers and mild winters.
B. It has long, cold winters.
C. It has a medium amount of rain.
Determine the correct option from the provided choices and reply with its corresponding letter.

B