How does beginning paragraph 5 with the phrase "neuroscientists have suggested" contribute to the meaning of the passage?

Neuroscientists are incredibly reliable because they are brain doctors who have gone through many years of tough schooling to become specialized in a specific part of the human body. So, as a paragraph starting with "neuroscientists have suggested", it is most likely in your best interest to heed the following advice. 

The correct answer would be d.