Context: Figure: Tibetan Plateau.
The Tibetan Plateau is a tundra ecosystem located in Tibet, western China, and northern India. The plateau is over 14,800 feet high and is surrounded by many mountain ranges.
Which statement describes the Tibetan Plateau ecosystem?
A. It has long, cold winters and short, cold summers.
B. It has many evergreen trees.
Determine the correct option from the provided choices and reply with its corresponding letter.

A