Whatever the union army ventures, part of their job , now, it's to protect the freedom of the former slaves . so it makes abolition and aim of the civil war .which it had not been up to the issuing of the proclamation .
The correct option is : A.) Rita will understand if you arrived late. ("will understand" and "arrived" are underlined)
The sequence of events is the structure of events as they arise in a story.
The beginning, middle and end of story have its own start and end.