In Apex which change usually accompanies a cold spell in Minnesota

The correct answer is "Polar jet streams moving south".

Explanation:

During winter, polar jet streams (bands of strong and cold wind) moves to the south. This happens when the North Pole becomes colder but the equator remains with the same temperature. This change usually results in a cold spell in Minnesota, since this state of the north is directly affected by polar jet streams moving south.

Minnesota receivers arctic air when the polar jet stream moves south across Canada.