I place this #1 because the URL is reliable, the grammar and spelling if fine, sponsored ads and the date it was published was in 2015 so it's not a long time ago and the author is a physician.
I placed this #2 because the grammar and spelling are correctly done. There is no advertisement. However, the author is a journalist, the extension is .org which is non-profit and we don't know when this article was published.
I placed this #3 because URL is reliable, published in 2016, grammar is correct, the author study Biopsychology. However, the advertisement is very strange.
I placed this #4 because the grammar is correct. The only problem is that the URL is .org which is non-profit, there's no date that it was published, the picture is seen on different websites, the advertisement is off topic, and there is no author shown.
I placed this #5 because the grammar is correct. But the date it was published is 2001, and the URL has a % (percent sign).