I think it is D. Too much credit use I might be wrong but im pretty sure its D.
I believe the final four are correct hope it helps :)
Answer: One must mourn before moving on
The subordinate clause in this sentence is 'Since I stopped vacuuming', and it is used as an adverb in this sentence, the adverb of time.
Though Rusesabagina was Hutu (his father was Hutu and his mother Tutsi), his wife Tatiana was a Tutsi and his children considered mixed. Due to this, he was unable to escape from the war zone with his family. When the violence broke out, Rusesabagina brought his family to the Hôtel des Mille Collines for safety.
