Here are the correct answers that would best complete the given paragraph above:
-Once he arrived at the beach, <span>Jonathan sat on a boulder and watched his dog, Hoolihan, outrun the spilling waves and then chase them back to sea in an endless cycle of fun.
-</span>Soon another sound reached his ears, like an unexpected voice in a chorus; <span>the faint but unmistakable bleating of sheep.
-</span>To his horror, he saw dozens of sheep trying to hold their ground as they crept <span>closer and closer to the edge of the cliff. </span>
Most likely because it appeals to the credibility of the author.
B. Though Benjamin Franklin was known for his instrumental role in the founding of the United States.
This is a sentence fragment, you can tell because saying the sentence in your head or out loud feels incomplete, that is because the sentence wasn't finished, for example, "Though Benjamin Franklin was known for his instrumental role in the founding of the United States, he had many other accomplishments." Is a full sentence.