Find the main idea. A useful summary distills the source material down to its most important point to inform the reader. ...
Keep it brief. A summary is not a rewrite—it's a short summation of the original piece
Write without judgment
Make sure it flows
<span>The ungrammatical example is I is hungry, which is the third option here. This is ungrammatical because the conjugation of the verb to be is incorrect - I always goes with am, not is, which is used for third person singular only, and I is first person singular. The second example is the only completely acceptable one. The first and fourth examples aren't ungrammatical, but they are colloquial and should not be used in written form.</span>
The answer is A. “Researchers' estimates of the actual number vary from three hundred to six thousand, but everyone knows that ads are everywhere.” (paragraph 1)
Explanation:
Conjunctions link grammatical elements. In the case of the coordinating conjunctions, which includes and, but, or, yet, etc., these are mainly used to coordinate or join elements of the same rank. This applies to complete ideas known as independent clauses, which creates compound sentences.
This can be seen in sentence A because this contains the coordinating conjunction "but". Also, you can know this is a coordinating conjunction because each of the clauses "but" joins is a complete idea or independent clause.