Select the tundra ecosystem.
A. This ecosystem has:
hot summers and cool winters
a medium amount of rain
soil that is rich in nutrients
B. This ecosystem has:
long, cold winters and short, cold summers
mostly small plants
soil that is frozen year-round
C. This ecosystem has:
warm summers and warm winters
a rainy season and a dry season
soil that is poor in nutrients
From the given choices, select the correct answer and reply with the letter of the chosen option.

B