The sentence that correctly integrates the quoted information is sentence 4 (C).
First, it is important to remember that you can not have a quote be the only thing in your sentence. In needs some sort of introduction or your own words at some point in the sentence. You also need to remember to quote the text. There are different ways to do this in MLA form, you can put the author and page number in parenthesis at the end of the sentence (see sentence 2) or you can include the author's name in the sentence and put the page number in parenthesis at the end (see sentence 4). Since sentence 4, is more than just a quote and includes correct citations, it correctly integrates the quoted information.
The correct answer is key ideas or key points. Key ideas are the ideas that are emphasized through repetition. These ideas are repeated because it needs to be emphasized in order to be understood clearly. Repeated ideas may include a word or phrases. In addition, repetition is also used to persuade or convince the readers.
Well assuming that you are implying a coding tag,
Img src is the tag that you use to show a picture
Image Source
This is all i can answer without a photo.