The third sentence. An abstract noun is a noun you can’t physically see or touch (examples of this are usually emotions like love, hate, excitement, etc). In the third sentence, opinion is a noun. You cannot see or touch an opinion.
Answer:
They interfere with the way you view the information
A.
Because the sentence is still clear and makes sense without the clause
Answer:
You should open the essay with a well thought out paragraph that explains what your argument is to that the topic of the essay is clear
Explanation: