Answer: B. In their consequences, these events have terrified have tortured have destroyed me.
A flashback is a scene that goes back in time from the current point of the story. The are used in order to fill in details that are necessary to understand for the present story. In this case, the author is saying that some events have caused him to be destroyed in the present. We can assume that the events happened in the past, and he is analyzing the consquences of them. By using flashbacks, the author is able to go back in time and tell us of these events.