Answer:
A
Explanation:
Definition of significant- sufficently great or important to be worthy of attention. A is the closest one
<em>Since you've been gone</em> is the subordinate clause.
The word since is a subordinate conjunction, and the rest of it is the subject (you) and been gone is a very phrase for the subordinate clause.
you've been gone explained above.
finished the book is the predicate of the main clause. finished is a verb and the book is the object.
B. Harmless is the correct answer