Which one of the following is mentioned in the passage as providing evidence that Herculina has a satellite? A. the diameter of a body directly observed near Herculina B. the distance between Herculina and planet nearest to it C. the shortest possible time in which satellites of Herculina, if any, could complete a single orbit D. the occultation that occurred shortly before the predicted occultation by Herculina E. the precise extent to which observed brightness dropped during the occultation by Herculina