Context: Figure: Tibetan Plateau.
The Tibetan Plateau is a tundra ecosystem located in Tibet, western China, and northern India.
Which better describes the Tibetan Plateau ecosystem?
A. It has mostly small plants. It also has soil that is frozen year-round.
B. It has long, cold winters. It also has many evergreen trees.
Answer with the option's letter from the given choices directly.

A