The polar vortex of cold air that normally stays above the Arctic has shifted 1 point southward, resulting in extreme winter storms across the US and other
parts of the world. What likely caused the polar vortex to shift? *

A. Long-established climate systems like the gulf stream are upset and throw off the
polar vortex winds

B. The Earth has titled on its axis so that places in the northern hemisphere are receiving
less sunlight at this time of year.

C. Long-established climate systems like the jet stream are upset and throw off the polar
vortex winds