The answer is C),
Why? Well, as Atticus said, killing a mockingbird is a sin, as they cause no harm and just sing harmonies.
It is a adverb clause.
Hope this helps!
Answer:
Tom couldn't attend the meeting because of a previous engagement.
Tom has been hunting for a job since he lost his previous job last year.
Tom connected the TV to the antenna that the previous owner of his house had mounted on the roof.
Explanation:
<span>the word that the appositive renames or further identifies - agent</span>