Which of the following options correctly pairs a biome and its characteristics?
a) temperate broadleaf forest = mild winters, moderate rainfall, predominantly dicot vegetation
b) chaparral = mild, rainy winters; long, hot, but wet summers
c) tundra = very cold winters; only the upper layer of the soil thaws during summer
d) savanna = long, cold winters, vegetation dominated by conifers
c) tundra = very cold winteres; only the upper layer of the soil thaws during summer