GMDSS: Element 7

1. A Distance & time of day, seasonal variations, sunspot cycle, solar flare alerts.
2. B Sunspot cycle, distance & time of day, seasonal variations, solar flare alerts.
3. C Solar flare alerts, distance & time of day, sunspot cycle, seasonal variations.
4. D Solar flare alerts, sunspot cycle, seasonal variations, distance & time of day.

Tip: press A-D to answer