If the northeast wind blows at point M, the location and nature of the weather system are respectively () A. Northern Hemisphere, Cyclone B. Northern Hemisphere, Anti-Cyclone C. Southern Hemisphere.

A, the airflow in the horizontal direction of the cyclone in the northern hemisphere flows counterclockwise from the periphery to the center, and the southeast wind blows at point M, so it does not meet the meaning of the question;

B, the horizontal airflow of the anticyclone in the northern hemisphere flows clockwise from the center to all directions, and the northwest wind blows at point M, so it does not meet the meaning of the question;

C, the horizontal airflow of the southern hemisphere cyclone flows clockwise from the periphery to the center, and the northeast wind blows at point M, so it is correct;

D, the air flow in the horizontal direction of the southern hemisphere anticyclone flows counterclockwise from the center to all directions, and the southwest wind blows at point M, so it does not meet the meaning of the question.

Therefore, it is selected as C. 。