Which event is marked by the omens described in the following passage? "In the marketplace and around men's houses and the temples of the gods dogs howled by night, the shades of the silent dead walked abroad and the city was shaken with earthquakes."
A. the impending battles between Rome and Carthage
B. the imminent murder of Caesar
C. the death of Ovid himself
D. the displeasure of Neptune, who is about to flood the land
E. the death of Augustus