No it is no a slang , it is not that informal.
It is a sentence fragment, the answer is c.
*You don't start a sentence with to.
*It doesn't specify a complete thought.
C. It leaves readers unsure about the credibility of the argument.
I say that is the answer because in the question it said the word anonymous and that word means unknown or unnamed and so that is the answer it leaves the reader unsure of who is writing
A precise paragraph is the gist of the whole content. I had surprised myself by being able to do the thing is the sentence that can replace the fifth sentence.
<h3>What is precise writing?</h3>
Precise writing is compression or the gist writing of the content highlighting just the important words. It covers the key details from the original text and explains them precisely.
It uses few words from the original text and conveys the idea to the readers. The fifth sentence can be replaced by using the words surprised, able, and myself.
Therefore, the fifth sentence can be replaced by option C. I had surprised myself.
Learn more about precise writing here:
brainly.com/question/22523657
