Voyager 2 was able to capture proof of the intensity of storms that occur on neptune. these are known to be times as strong as those on earth. a nine b three c two d six

Voyager 2 was able to capture proof of the intensity of storms that occur on Neptune. These are known to be Nine times as strong as those on Earth.  

Explanation:

Neptune has huge storm system. Strong wind storms blow on the surface of the planet Neptune. The speed of the storm is about 2100 km/h which is about nine times the speed of storms on Earth. The Great Dark Spot is huge storm which is as big as the size of the Earth. Voyager 2 was able to capture the image of the storm occurring on Neptune which provided the proof of the intensity of the storms.