The kind of device this author is using is Dramatic Irony, when the reader knows something the character does not.
Basically look at the options and say them out loud. If it sounds like a full complete sentence, its a dependent clause. It can be its own sentence!
In this case, that option is B. Hope this helps!
(I would appreciate it if you helped me by making this the brainliest answer)
Cut unnecessary things
e.g 1.quick unnecessary conversations.
Do only what really matters in time and try to be fast as you can to save your time for other important things
