I believe it is a. After the ferry ride, Marquis walked home and sat in the backyard to enjoy the pleasant weather.
If it's what I think you're talking about, I just had it on a test and it should be (C) sole,
Hope this helps
Therefore implies that something is occurring as a result of something else. As a result, therefore best implies a cause and effect structure.
B. They provide supporting details. I apologize if this is incorrect.