If global warming continues at its present rate, about 1oc/century, which biomes will likely take the place of the taiga

This question is incomplete. The options are:
A) tundra and polar ice 
B) temperate broadleaf forest and grassland 
C) desert and chaparral 
D) tropical forest and savanna 
E) chaparral and temperate broadleaf forest

Taiga is coniferous forest. Usually this type of forest is found in alpine cold regions. Global warming would result in overall warmer climate, but not desert. Therefore, the most likely answer is B: temperate broadleaf forest and grassland.

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