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What is the typical direction of movement for a polar front low?

  • A

    To the northeast during winter, to the southeast during summer.

  • B

    To the northwest during winter, to the southwest during summer.

  • C

    Parallel to the warm front line to the south.

  • D

    Parallel to the the warm-sector isobars.

Refer to figure.
The warm sector shifts with the movement of the warm and cold fronts, gradually narrowing as the faster-moving cold front overtakes it. The low pressure center at the tip of the warm sector moves parallel to the isobars within the warm sector, its speed determined by the spacing between consecutive isobars.

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